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-Ethyl pyrazine
2-Ethyl-3-methyl pyrazine
2-Ethyl-3,(5 or 6)-dimethyl pyrazine
2,3-Diethyl pyrazine
2,3 -Diethyl -5 -methyl pyrazine
2-Methoxy pyrazine
2-Methylthio pyrazine
2 -Methoxy -3 -methyl pyrazine
2-,5or6-Methoxy-3- methylpyrazine
