5521-57-3
5-甲基吡嗪-2-羧酰胺
→
51037-25-3
5-methyl-4-oxidopyrazin-4-ium-2-carboxamide
51037-30-0
阿西莫司
74416-38-9
methyl 5-methyl-4-oxidopyrazin-4-ium-2-carboxylate