3-(4-甲基苯甲酰)丙酸

4-(4-甲基苯基)-4-氧代丁酸甲酯

Methyl 3-bromo-4-keto-4-(4'-methylphenyl)butanoate

对甲基苯甲醛

ethylidene(triphenyl)-λ⁵-phosphane