3385-34-0
4,6-二甲基-2-氧-2H-吡喃-5-甲酸乙酯
+
7697-37-2
硝酸
→
6272-87-3
ethyl 2,4-dimethyl-5-nitro-6-oxopyran-3-carboxylate
89193-18-0
ethyl 3,5-dimethyl-1-phenylpyrazole-4-carboxylate