5,5-dimethyl-3-methylidenepyrrolidin-2-one

3-(4-chlorophenyl)-6-oxo-8,8-dimethyl-1-oxa-2,7-diazaspiro[4.4]non-2-ene

1-[3-(4-chlorophenyl)-7-methyl-7aH-diazaphospholo[3,4-d][1,2,4]oxazaphosphol-5-yl]ethanone

3-(4-chlorophenyl)-4-methyl-6-phenyl-3aH-diazarsolo[4,3-d][1,2,5]oxazarsole

3,6-bis(4-chlorophenyl)-1,4,2,5-dioxadiazine