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2-Methylthio-3- methyl pyrazine
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2-Ethoxy-3（5/6）- methyl pyrazine
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2-Methoxy-3（5/6）- methyl pyrazine
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2-Methoxy-3-methyl pyrazine
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2-Methylthio pyrazine
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2-Furfurylthio pyrazine
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2-Ethoxy pyrazine
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2. 3-Diethyl-5-methyl pyrazine
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2-Methoxy pyrazine
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