91004-89-6
5-(1-carboxy-1-methyl-ethyl)-3-methyl-isoxazole-4-carboxylic acid
→
90087-36-8
5-异丙基-3-甲基异噁唑-4-羧酸
69083-54-1
5-ethyl-3-methyl-1,2-oxazole-4-carboxylic acid
+
74-88-4
甲基碘
79322-87-5
ethyl 2-acetyl-4-methyl-3-oxopentanoate