2-Methyl-3(5or6)-ethoxypyrazine
2-Methyl-3,5-or6-(furfurylthio)-pyrazine
2-Ethyl-3-methyl pyrazine
2-Ethyl pyrazine
2-Ethyl-3,（5or6)-dimethyl pyrazine
5,6,7,8-Tetrahydro quinoxaline
5-Methyl quinoxaline
2-Acetyl thiazole
2-Isobutyl thiazole
5-Hydroxyethyl-4-methyl thiazole
4-Methyl-5-(2-acetoxyethyl)thiazole
2,4-Dimethyl-5-acetyl thiazole
4,5-Dimethyl-2-isobutyl-3-thiazoline
2-Acetyl furan
2-Acetyl-5-methyl furan
2-Methyl-3-furanthiol
2,5-Dimethyl-3- furanthiol
2-Methyl-3-(methylthio)furan
2-Methyl-3-tetrahydrofuranthiol
2-Methyltetrahydrofuran-3-one
3-（Acetylthio)-2-methylfuran
5-Methyl furfural
2-Acetyl pyrrole
Tetrahydrothiophen-3-One
2-Mercaptothiophene
