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2-Methoxy-3(or5or6)-methylpyrazine
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2-Ethoxypyrazine
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2-Ethoxy-3(or 5 or 6)-methylpyrazine
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2-Methylthio-3-methylpyrazine
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2-Furfurylthio-3(or5or6) methylpyrazine
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2-Methoxy-3isobutylpyrazine
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2-Methoxy-3-sec-butylpyrazine
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2-Methoxypyrazine
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2-Methylthiopyrazine
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5,6,7,8-Tetrahy droquinoxaline
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