Table of Contents Executive Summary 1 Industry Overview of Tetramethylpyrazine 1.1 Definition of Tetramethylpyrazine 1.2 Tetramethylpyrazine Segment by Type 1.2.1 Global Tetramethylpyrazine Production Growth Rate Comparison by Types (2014-2025) 1.2.2 Food Grade 1.2.3 Perfumery Grade 1.2.4 Pharmaceutical Grade 1.3 Tetramethylpyrazine Segment by Applications 1.3.1 Global Tetramethylpyrazine Consumption Comparison by Applications (2014-2025) 1.3.2 Parfum 1.3.3 Medicine 1.3.4 Flavoring Agents 1.3.5 Other 1.4 Global Tetramethylpyrazine Overall Market 1.4.1 Global Tetramethylpyrazine Revenue (2014-2025) 1.4.2 Global Tetramethylpyrazine Production (2014-2025) 1.4.3 North America Tetramethylpyrazine Status and Prospect (2014-2025) 1.4.4 Europe Tetramethylpyrazine Status and Prospect (2014-2025) 1.4.5 China Tetramethylpyrazine Status and Prospect (2014-2025) 1.4.6 Japan Tetramethylpyrazine Status and Prospect (2014-2025) 1.4.7 Southeast Asia Tetramethylpyrazine Status and Prospect (2014-2025) 1.4.8 India Tetramethylpyrazine Status and Prospect (2014-2025) 2 Manufacturing Cost Structure Analysis 2.1 Raw Material and Suppliers 2.2 Manufacturing Cost Structure Analysis of Tetramethylpyrazine 2.3 Manufacturing Process Analysis of Tetramethylpyrazine 2.4 Industry Chain Structure of Tetramethylpyrazine 3 Development and Manufacturing Plants Analysis of Tetramethylpyrazine 3.1 Capacity and Commercial Production Date 3.2 Global Tetramethylpyrazine Manufacturing Plants Distribution 3.3 Major Manufacturers Technology Source and Market Position of Tetramethylpyrazine 3.4 Recent Development and Expansion Plans 4 Key Figures of Major Manufacturers 4.1 Tetramethylpyrazine Production and Capacity Analysis 4.2 Tetramethylpyrazine Revenue Analysis 4.3 Tetramethylpyrazine Price Analysis 4.4 Market Concentration Degree 5 Tetramethylpyrazine Regional Market Analysis 5.1 Tetramethylpyrazine Production by Regions 5.1.1 Global Tetramethylpyrazine Production by Regions 5.1.2 Global Tetramethylpyrazine Revenue by Regions 5.2 Tetramethylpyrazine Consumption by Regions 5.3 North America Tetramethylpyrazine Market Analysis 5.3.1 North America Tetramethylpyrazine Production 5.3.2 North America Tetramethylpyrazine Revenue 5.3.3 Key Manufacturers in North America 5.3.4 North America Tetramethylpyrazine Import and Export 5.4 Europe Tetramethylpyrazine Market Analysis 5.4.1 Europe Tetramethylpyrazine Production 5.4.2 Europe Tetramethylpyrazine Revenue 5.4.3 Key Manufacturers in Europe 5.4.4 Europe Tetramethylpyrazine Import and Export 5.5 China Tetramethylpyrazine Market Analysis 5.5.1 China Tetramethylpyrazine Production 5.5.2 China Tetramethylpyrazine Revenue 5.5.3 Key Manufacturers in China 5.5.4 China Tetramethylpyrazine Import and Export 5.6 Japan Tetramethylpyrazine Market Analysis 5.6.1 Japan Tetramethylpyrazine Production 5.6.2 Japan Tetramethylpyrazine Revenue 5.6.3 Key Manufacturers in Japan 5.6.4 Japan Tetramethylpyrazine Import and Export 5.7 Southeast Asia Tetramethylpyrazine Market Analysis 5.7.1 Southeast Asia Tetramethylpyrazine Production 5.7.2 Southeast Asia Tetramethylpyrazine Revenue 5.7.3 Key Manufacturers in Southeast Asia 5.7.4 Southeast Asia Tetramethylpyrazine Import and Export 5.8 India Tetramethylpyrazine Market Analysis 5.8.1 India Tetramethylpyrazine Production 5.8.2 India Tetramethylpyrazine Revenue 5.8.3 Key Manufacturers in India 5.8.4 India Tetramethylpyrazine Import and Export 6 Tetramethylpyrazine Segment Market Analysis (by Type) 6.1 Global Tetramethylpyrazine Production by Type 6.2 Global Tetramethylpyrazine Revenue by Type 6.3 Tetramethylpyrazine Price by Type 7 Tetramethylpyrazine Segment Market Analysis (by Application) 7.1 Global Tetramethylpyrazine Consumption by Application 7.2 Global Tetramethylpyrazine Consumption Market Share by Application (2014-2019) 8 Tetramethylpyrazine Major Manufacturers Analysis 8.1 Ernesto Ventos S.A 8.1.1 Ernesto Ventos S.A Tetramethylpyrazine Production Sites and Area Served 8.1.2 Ernesto Ventos S.A Product Introduction, Application and Specification 8.1.3 Ernesto Ventos S.A Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.1.4 Main Business and Markets Served 8.2 Merck Millipore 8.2.1 Merck Millipore Tetramethylpyrazine Production Sites and Area Served 8.2.2 Merck Millipore Product Introduction, Application and Specification 8.2.3 Merck Millipore Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.2.4 Main Business and Markets Served 8.3 Ambles Nature Et Chimie 8.3.1 Ambles Nature Et Chimie Tetramethylpyrazine Production Sites and Area Served 8.3.2 Ambles Nature Et Chimie Product Introduction, Application and Specification 8.3.3 Ambles Nature Et Chimie Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.3.4 Main Business and Markets Served 8.4 Anec 8.4.1 Anec Tetramethylpyrazine Production Sites and Area Served 8.4.2 Anec Product Introduction, Application and Specification 8.4.3 Anec Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.4.4 Main Business and Markets Served 8.5 Sigma-Aldrich 8.5.1 Sigma-Aldrich Tetramethylpyrazine Production Sites and Area Served 8.5.2 Sigma-Aldrich Product Introduction, Application and Specification 8.5.3 Sigma-Aldrich Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.5.4 Main Business and Markets Served 8.6 Oxford Chemicals Limited 8.6.1 Oxford Chemicals Limited Tetramethylpyrazine Production Sites and Area Served 8.6.2 Oxford Chemicals Limited Product Introduction, Application and Specification 8.6.3 Oxford Chemicals Limited Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.6.4 Main Business and Markets Served 8.7 Triton Chemtech 8.7.1 Triton Chemtech Tetramethylpyrazine Production Sites and Area Served 8.7.2 Triton Chemtech Product Introduction, Application and Specification 8.7.3 Triton Chemtech Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.7.4 Main Business and Markets Served 8.8 Shandong Tengzhou Wutong Aromatizer 8.8.1 Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production Sites and Area Served 8.8.2 Shandong Tengzhou Wutong Aromatizer Product Introduction, Application and Specification 8.8.3 Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.8.4 Main Business and Markets Served 8.9 Shandong Jitian Aroma Chemical 8.9.1 Shandong Jitian Aroma Chemical Tetramethylpyrazine Production Sites and Area Served 8.9.2 Shandong Jitian Aroma Chemical Product Introduction, Application and Specification 8.9.3 Shandong Jitian Aroma Chemical Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.9.4 Main Business and Markets Served 8.10 Nantong Chem-Tech 8.10.1 Nantong Chem-Tech Tetramethylpyrazine Production Sites and Area Served 8.10.2 Nantong Chem-Tech Product Introduction, Application and Specification 8.10.3 Nantong Chem-Tech Tetramethylpyrazine Production, Revenue, Ex-factory Price and Gross Margin (2014-2019) 8.10.4 Main Business and Markets Served 8.11 Extrasynthese 8.12 Buckton Scott Nutrition 8.13 Lansdowne Chemicals 9 Development Trend of Analysis of Tetramethylpyrazine Market 9.1 Global Tetramethylpyrazine Market Trend Analysis 9.1.1 Global Tetramethylpyrazine Market Size (Volume and Value) Forecast 2019-2025 9.2 Tetramethylpyrazine Regional Market Trend 9.2.1 North America Tetramethylpyrazine Forecast 2019-2025 9.2.2 Europe Tetramethylpyrazine Forecast 2019-2025 9.2.3 China Tetramethylpyrazine Forecast 2019-2025 9.2.4 Japan Tetramethylpyrazine Forecast 2019-2025 9.2.5 Southeast Asia Tetramethylpyrazine Forecast 2019-2025 9.2.6 India Tetramethylpyrazine Forecast 2019-2025 9.3 Tetramethylpyrazine Market Trend (Product Type) 9.4 Tetramethylpyrazine Market Trend (Application) 10.1 Marketing Channel 10.1.1 Direct Marketing 10.1.2 Indirect Marketing 10.3 Tetramethylpyrazine Customers 11 Market Dynamics 11.1 Market Trends 11.2 Opportunities 11.3 Market Drivers 11.4 Challenges 11.5 Influence Factors 12 Conclusion 13 Appendix 13.1 Methodology/Research Approach 13.1.1 Research Programs/Design 13.1.2 Market Size Estimation 13.1.3 Market Breakdown and Data Triangulation 13.2 Data Source 13.2.1 Secondary Sources 13.2.2 Primary Sources 13.3 Author List 13.4 Disclaimer

List of Tables and Figures Figure Picture of Tetramethylpyrazine Table Global Tetramethylpyrazine Production (K MT) Growth Rate Comparison by Types (2014-2025) Figure Global Tetramethylpyrazine Production Market Share by Types in 2018 Figure Food Grade Product Picture Figure Perfumery Grade Product Picture Figure Pharmaceutical Grade Product Picture Table Global Tetramethylpyrazine Consumption (K MT) Comparison by Applications (2014-2025) Figure Global Tetramethylpyrazine Consumption Market Share by Applications in 2018 Figure Parfum Figure Medicine Figure Flavoring Agents Figure Other Figure Global Tetramethylpyrazine Revenue (Million USD) (2014-2025) Figure Global Tetramethylpyrazine Production (K MT) (2014-2025) Figure North America Tetramethylpyrazine Market Size (Million USD) (2014-2025) Figure Europe Tetramethylpyrazine Market Size (Million USD) (2014-2025) Figure China Tetramethylpyrazine Market Size (Million USD) (2014-2025) Figure Japan Tetramethylpyrazine Market Size (Million USD) (2014-2025) Figure Southeast Asia Tetramethylpyrazine Market Size (Million USD) (2014-2025) Figure India Tetramethylpyrazine Market Size (Million USD) (2014-2025) Table Tetramethylpyrazine Raw Material and Suppliers Table Manufacturing Cost Structure Analysis of Tetramethylpyrazine in 2018 Figure Manufacturing Process Analysis of Tetramethylpyrazine Figure Industry Chain Structure of Tetramethylpyrazine Table Capacity and Commercial Production Date of Key Manufacturers Table Global Tetramethylpyrazine Manufacturing Plants Distribution Table Tetramethylpyrazine Major Manufacturers Technology Source and Market Position Table Recent Development and Expansion Plans in Future Table Tetramethylpyrazine Capacity (K MT) of Major Manufacturers (2014-2019) Table Tetramethylpyrazine Production (K MT) of Major Manufacturers (2014-2019) Table Tetramethylpyrazine Production Market Share of Major Manufacturers (2014-2019) Figure Tetramethylpyrazine Production Share by Manufacturers in 2018 Table Tetramethylpyrazine Revenue (Million US$) of Major Manufacturers (2014-2019) Table Tetramethylpyrazine Revenue Market Share of Major Manufacturers (2014-2019) Figure Tetramethylpyrazine Revenue Share by Manufacturers in 2018 Table Tetramethylpyrazine Average Price (USD/MT) of Major Manufacturers (2014-2019) Table Global Manufacturers Market Concentration Ratio (CR5 and HHI) Table Global Tetramethylpyrazine Production by Regions 2014-2019 (K MT) Table Global Tetramethylpyrazine Production Market Share by Regions 2014-2019 Figure Global Tetramethylpyrazine Production Market Share by Regions in 2018 Table Global Tetramethylpyrazine Revenue by Regions 2014-2019 (Million USD) Table Global Tetramethylpyrazine Revenue Market Share by Regions 2014-2019 Figure Global Tetramethylpyrazine Revenue Market Share by Regions in 2018 Table Global Tetramethylpyrazine Consumption by Regions 2014-2019 (K MT) Table Global Tetramethylpyrazine Consumption Market Share by Regions 2014-2019 Figure North America Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure North America Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table North America Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure Europe Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure Europe Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table Europe Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure China Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure China Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table China Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure Japan Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure Japan Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table Japan Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure Southeast Asia Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure Southeast Asia Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table Southeast Asia Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure India Tetramethylpyrazine Production Growth Rate 2014-2019 (K MT) Figure India Tetramethylpyrazine Revenue Growth Rate 2014-2019 (Million USD) Table India Tetramethylpyrazine Production, Consumption Import and Export (K MT) Figure Global Consumption Tetramethylpyrazine Market Share by Application (2014-2019) Figure Global Value (Consumption) Tetramethylpyrazine Market Share by Application (2014-2019) Table Ernesto Ventos S.A Tetramethylpyrazine Production Sites and Area Served Table Ernesto Ventos S.A Tetramethylpyrazine Product Introduction, Application and Specification Table Ernesto Ventos S.A Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Ernesto Ventos S.A Tetramethylpyrazine Production Growth Rate (2014-2019) Table Ernesto Ventos S.A Tetramethylpyrazine Production Market Share (2014-2019) Figure Ernesto Ventos S.A Tetramethylpyrazine Revenue Market Share (2014-2019) Table Ernesto Ventos S.A Tetramethylpyrazine Main Business and Markets Served Table Merck Millipore Tetramethylpyrazine Production Sites and Area Served Table Merck Millipore Tetramethylpyrazine Product Introduction, Application and Specification Table Merck Millipore Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Merck Millipore Tetramethylpyrazine Production Growth Rate (2014-2019) Table Merck Millipore Tetramethylpyrazine Production Market Share (2014-2019) Figure Merck Millipore Tetramethylpyrazine Revenue Market Share (2014-2019) Table Merck Millipore Tetramethylpyrazine Main Business and Markets Served Table Ambles Nature Et Chimie Tetramethylpyrazine Production Sites and Area Served Table Ambles Nature Et Chimie Tetramethylpyrazine Product Introduction, Application and Specification Table Ambles Nature Et Chimie Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Ambles Nature Et Chimie Tetramethylpyrazine Production Growth Rate (2014-2019) Table Ambles Nature Et Chimie Tetramethylpyrazine Production Market Share (2014-2019) Figure Ambles Nature Et Chimie Tetramethylpyrazine Revenue Market Share (2014-2019) Table Ambles Nature Et Chimie Tetramethylpyrazine Main Business and Markets Served Table Anec Tetramethylpyrazine Production Sites and Area Served Table Anec Tetramethylpyrazine Product Introduction, Application and Specification Table Anec Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Anec Tetramethylpyrazine Production Growth Rate (2014-2019) Table Anec Tetramethylpyrazine Production Market Share (2014-2019) Figure Anec Tetramethylpyrazine Revenue Market Share (2014-2019) Table Anec Tetramethylpyrazine Main Business and Markets Served Table Sigma-Aldrich Tetramethylpyrazine Production Sites and Area Served Table Sigma-Aldrich Tetramethylpyrazine Product Introduction, Application and Specification Table Sigma-Aldrich Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Sigma-Aldrich Tetramethylpyrazine Production Growth Rate (2014-2019) Table Sigma-Aldrich Tetramethylpyrazine Production Market Share (2014-2019) Figure Sigma-Aldrich Tetramethylpyrazine Revenue Market Share (2014-2019) Table Sigma-Aldrich Tetramethylpyrazine Main Business and Markets Served Table Oxford Chemicals Limited Tetramethylpyrazine Production Sites and Area Served Table Oxford Chemicals Limited Tetramethylpyrazine Product Introduction, Application and Specification Table Oxford Chemicals Limited Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Oxford Chemicals Limited Tetramethylpyrazine Production Growth Rate (2014-2019) Table Oxford Chemicals Limited Tetramethylpyrazine Production Market Share (2014-2019) Figure Oxford Chemicals Limited Tetramethylpyrazine Revenue Market Share (2014-2019) Table Oxford Chemicals Limited Tetramethylpyrazine Main Business and Markets Served Table Triton Chemtech Tetramethylpyrazine Production Sites and Area Served Table Triton Chemtech Tetramethylpyrazine Product Introduction, Application and Specification Table Triton Chemtech Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Triton Chemtech Tetramethylpyrazine Production Growth Rate (2014-2019) Table Triton Chemtech Tetramethylpyrazine Production Market Share (2014-2019) Figure Triton Chemtech Tetramethylpyrazine Revenue Market Share (2014-2019) Table Triton Chemtech Tetramethylpyrazine Main Business and Markets Served Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production Sites and Area Served Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Product Introduction, Application and Specification Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production Growth Rate (2014-2019) Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Production Market Share (2014-2019) Figure Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Revenue Market Share (2014-2019) Table Shandong Tengzhou Wutong Aromatizer Tetramethylpyrazine Main Business and Markets Served Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Production Sites and Area Served Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Product Introduction, Application and Specification Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Production Growth Rate (2014-2019) Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Production Market Share (2014-2019) Figure Shandong Jitian Aroma Chemical Tetramethylpyrazine Revenue Market Share (2014-2019) Table Shandong Jitian Aroma Chemical Tetramethylpyrazine Main Business and Markets Served Table Nantong Chem-Tech Tetramethylpyrazine Production Sites and Area Served Table Nantong Chem-Tech Tetramethylpyrazine Product Introduction, Application and Specification Table Nantong Chem-Tech Tetramethylpyrazine Production (K MT), Revenue (Million USD), Ex-factory Price (USD/MT) and Gross Margin (2014-2019) Table Nantong Chem-Tech Tetramethylpyrazine Production Growth Rate (2014-2019) Table Nantong Chem-Tech Tetramethylpyrazine Production Market Share (2014-2019) Figure Nantong Chem-Tech Tetramethylpyrazine Revenue Market Share (2014-2019) Table Nantong Chem-Tech Tetramethylpyrazine Main Business and Markets Served Table Extrasynthese Tetramethylpyrazine Production Sites and Area Served Table Buckton Scott Nutrition Tetramethylpyrazine Production Sites and Area Served Table Lansdowne Chemicals Tetramethylpyrazine Production Sites and Area Served Figure Global Tetramethylpyrazine Production (K MT) Growth Rate Forecast 2019-2025 Figure Global Tetramethylpyrazine Revenue (Million USD) Growth Rate Forecast 2019-2025 Figure Global Tetramethylpyrazine Sales Price (USD/MT) Forecast 2019-2025 Figure North America Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure North America Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Figure Europe Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure Europe Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Figure China Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure China Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Figure Japan Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure Japan Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Figure Southeast Asia Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure Southeast Asia Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Figure India Tetramethylpyrazine Production Growth Rate Forecast 2019-2025 (K MT) Figure India Tetramethylpyrazine Revenue Growth Rate Forecast 2019-2025 (Million USD) Table Global Production (K MT) of Tetramethylpyrazine by Type (2019-2025) Table Global Consumption (K MT) of Tetramethylpyrazine by Application (2019-2025) Table Tetramethylpyrazine Distributors List Table Tetramethylpyrazine Customers List Table Market Key Trends Table Key Opportunities Table Market Key Drivers Table Key Challenges Table Key Influence Factors Table Research Programs/Design for This Report Figure Bottom-up and Top-down Approaches for This Report Figure Data Triangulation Table Key Data Information from Secondary Sources Table Key Data Information from Primary Sources

Ernesto Ventos S.A Merck Millipore Ambles Nature Et Chimie Anec Sigma-Aldrich Oxford Chemicals Limited Triton Chemtech Shandong Tengzhou Wutong Aromatizer Shandong Jitian Aroma Chemical Nantong Chem-Tech Extrasynthese Buckton Scott Nutrition Lansdowne Chemicals