甲基丙二酰胺

2-(1,3-dimethoxy-1,3-dioxopropan-2-yl)-4-nitrobenzoic acid

dimethyl 2-(2-fluoro-4-nitrophenyl)propanedioate

2-[二(甲硫基)亚甲基]-丙二酸二甲酯

dimethyl 2-(4-methylpent-3-enyl)propanedioate