2,2-dichloro-3,6-dimethyloxasiline

2,3,4,4-tetrachloro-1,5-dimethyl-8-oxabicyclo[3.2.1]octa-2,6-diene

1,4-dimethyl-7-oxabicyclo<2.2.1>hept-5-ene-2,3-dicarboxylic anhydride

2,5-dimethyl-3,4-bis(trifluoromethyl)furan

1,3-dimethylcyclopropene