20734-18-3
diethyl 2-(hydroxymethylidene)propanedioate
→
~78%
28783-51-9
2-氯亚甲基-丙二酸 二乙酯
33142-25-5
2-甲酰基丙二酸二乙酯
626-10-8
diethyl 2-chlorobut-2-enedioate