ethyl 3-benzoyl-3-bromo-4-oxo-4-phenyl-2-(triphenyl-5-phosphanylidene)butanoate

ethyl (2E)-5-bromo-2-penten-4-ynoate

ethyl (2E,4Z)-4,5-dibromo-2,4-pentadienoate

3-苯甲酰基丙烯酸乙酯

(Z)-ethyl 4-oxo-4-phenylbut-2-enoate