27931-91-5
dimethyl 2-(hydroxymethylidene)propanedioate
+
108-24-7
乙酸酐
→
~80%
88456-30-8
dimethyl 2-(acetyloxymethylidene)propanedioate
108-59-8
丙二酸二甲酯
22398-14-7
甲氧基亚甲基马来酸二甲酯