Z-2-(2,3-Dichlorophenyl)methylene-3-oxobutanoic acid methyleater

4-(2,3-二氯苯基)-1,4-二氢-2,6-二甲基-3,5-吡啶二甲酸甲基(1-丁酰氧基)甲酯

Methyl (1-oxobutoxy)methyl 4-(2,3-dichlorophenyl)-1,4-dihydro-2,6-dime thyl-3,5-pyridinedicarboxylate