1007476-32-5
sodium acetyl acetic acid ethyl ester
+
141-75-3
正丁酰氯
→
6295-32-5
ethyl (Z)-3-butanoyloxybut-2-enoate
18417-40-8
1,2,5-Oxadiazole-3,4-dicarboxylic acid, 3,4-diethyl ester, 5-oxide