6,6-二甲基-5-亚甲基-1,3-环戊二烯

3-甲基-2-环戊烯-1-酮

Spiro[bicyclo[2.2.1]hept-5-ene-2,4'(5'H)-oxazol]-5'-one, 2',3-diphenyl-,(1R,2S,3S,4S)-rel-

4-苯亚甲基-2-苯基-2-噁唑英-5-酮

2,3-降莰烷二羧酸