105-50-0
1,3-丙酮二羧酸二乙酯
→
~89%
52358-42-6
diethyl penta-2,3-dienedioate
77435-10-0
ethyl 2-(2-ethoxy-2-oxoethyl)-1H-indole-3-carboxylate
67116-19-2
4-甲基-2H-吡喃-2,6(3h)-二酮