5521-60-8
5-甲基吡嗪-2,3-二羧酸
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74-89-5
甲胺
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90185-89-0
Pyrazinecarboxamide, N,6-dimethyl- (9CI)
7132-15-2
N,5-dimethylpyrazine-2-carboxamide
52197-12-3
2,3-二氰基-5-甲基吡嗪