2-phenyl-4-methyl-4-(3-methyl-2-butenyl)-Δ2-oxazolin-5-one

2-allyl-2-methyl-4-phenyl-Δ3-oxazolin-5-one

苯甲醛

2-甲基-4-苯基-1,3-恶唑-5(2H)-酮

2-methyl-3-phenyl-2H-azirine