pyrazine

2 - isobutyl - 3 - methyl pyrazine 

3, 5 - dimethyl - 2 - ethyl pyrazi... 

2-propyl pyrazine 

2-acetyl-3,5 (or 6)-dimethyl pyraz... 

2-acetyl-3-ethyl pyrazine 

2-acetyl-3-methyl pyrazine 

2-acetyl pyrazine 

2-methyl-3 (5 or 6)-ethoxy pyrazin... 

2-methyl sulfonium pyrazine 

2-ethoxy-3-isiobutyl pyrazine 

2-methoxy-3-isobutyl pyrazine 

2-methoxy-3 (5 or 6)-isopropyl pyr... 

2-methyl (ethyl)-(5 or 6) 3-methox... 

2-isobutyl-3-methyl pyrazine 

2-ethyl-3,5(6)-dimethyl pyrazine 

2-ethyl-5-methyl pyrazine 

2,3-diethyl-5-methyl pyrazine 

2,5-Dimethyl pyrazine 

2,5-Dimethyl pyrazine 

2,3-dimethyl pyrazine 

2 - mercapto pyrazine 

3-(trifluoromethyl)-5,6,7,8-tetrah...   

pyrazine ethyl mercaptan 

2 - methyl - 5 - ethyl pyrazine 

2, 3 - diethyl - 5 - methyl pyrazi... 

2 - ethyl - 3 - methyl pyrazine 

ethyl pyrazine, 2 - ethyl - 1, 4 -... 

tetramethyl pyrazine, ligustrazine 

three methyl pyrazine 

2,3-Dietyl pyrazine 

2, 5 - dimethyl pyrazine 

2 - butyl pyrazine 

2 - ethoxy pyrazine 

2 - butyl - 3 - methyl pyrazine 

2 - pyrazine ethyl mercaptan 

2 - propyl pyrazine 

(5 h) - 5 - methyl - 6, 7 - dihydr... 

2 - methyl - 3 (5 or 6) - the chaf... 

2 - acetyl - 3, 5 (or 6) - dimethy... 

2 - acetyl - 3 - ethyl pyrazine 

2 - acetyl - 3 - methyl pyrazine 

2 - acetyl pyrazine 

2 - methyl - 3 (5 or 6) - ethoxy p... 

2 - methyl - 3 (5 or 6) - in a har... 

2 - methyl sulfonium pyrazine 

2 - methoxy - 3 - ZhongDingJi pyra... 

2 - methoxy - 3 - isobutyl pyrazin... 

2 - methoxy - 3 (5 or 6) - isoprop... 

2 - methyl (ethyl) - (5 or 6) 3 - ... 

2 -- 5 or 6 - methoxy - 3 - methyl...