6-methyl-2-oxo-3-phenyl-2H-pyran-5-carboxylic acid

DL-2-氯-2-苯基乙酰氯

2-methyl-5-phenyl-1,3,4-oxadiazin-6-one

2,5-降冰片二烯

5-carbethoxy-6-methyl-3-phenyl-2-pyrone