2-hydroxy-4-oxo-4-p-bromophenylbut-2-enoic acid ethyl ester

ethyl 4-(4-bromophenyl)-4-hydroxy-2-oxobut-3-enoate

Ethyl 4-(4-bromophenyl)-2,4-dioxobutanoate

1-乙酰基-4-溴苯

ethyl 5-(4-bromophenyl)-5-hydroxy-4,5-dihydro-3-isoxazolecarboxylate