2,3-hexanedione
2-Acetyl pyrazine
2-Methyl pyrazine
2,3-Dimethyl pyrazine
2,5-Dimethyl pyrazine
2,6-Dimethyl pyrazine
2,3,5-Trimethyl pyrazine
2,3,5,6-Tetramethyl pyrazine
2-Methyl-3-(5or6)-methylthio pyrazine
2-,5or6-Methoxy-3-methyl pyrazine
2-Methyl-3(5or6)-ethoxypyrazine
2-Methyl-3,5-or6-(furfurylthio)-pyrazi
2-Ethyl-3-methyl pyrazine
2-Ethyl pyrazine
2-Acetyl-3-methyl pyrazine
2-Acetyl-3-ethyl pyrazine
2,3-Diethyl-5-methylpyrazine
2-Methoxy-3-sec-butyl pyrazine
2-Isopropyl-3-methoxypyrazine
2-Methoxy-3-isobutyl pyrazine
2-Acetyl-3,5(or6)dimethyl pyrazine
2-Ethyl-3,（5or6)-dimethyl pyrazine
2-Methoxy pyrazine
2-Methylthio pyrazine
5,6,7,8-Tetrahydro quinoxaline
5-Methyl quinoxaline
Pyrazine ethanethiol
(5H)-5-Methyl-6,7-dihydro-cyclopenta(b
2-Acetyl thiazole
4,5-Dimethyl thiazole
