(1R,3R,4S)-3-(tert-butyl)-2-thiabicyclo[2.2.1]hept-5-ene

1-(4-甲基苯基)-1H-吡咯-2,5-二酮

丙烯酸甲酯

5-(bicyclo(2.2.1)hept-5'-en-2'-ylidene)-2,2-dimethyl-1,3-dioxan-4,6-dione

二环[3.2.0]庚-6-烯