5-anilino-2-ethyl-2,3-dimethyl-2,3-dihydro-1,3,4-thiadiazole
2-ethyl-2-methyl-4,6,6-triphenyl-1-thia-4-azaspiro<2.3>hexan-5-one
4-s-butylidene-1,3,3-triphenylazetidin-2-one
3-isobutylideneamino-2-phenylimino-1,3-thiazolidin-4-one
5-ethyl-5-methyl-4-phenyl-4,5-dihydro-[1,2,4]triazole-3-thione