2,3',3',4',4'-pentamethyl-1H-isoindole-1-spiro-2'-thietan-3(2H)-one

2-methyl-3',4'-diphenylspiro[isoindole-3,2'-thiete]-1-one

2-methyl-4'5'-diphenyl-2,3-dihydro-1H-isoindole-3-spiro-3'-(1',2'-dithiol)-1-one

2,2''-dimethyl-1H-isoindole-1-spiro-2'-[1',4']dithiane-3'-spiro-1''-1''H-isoindole-5'-spiro-1'''-cyclohexane-3,3''(2H,2''H)-dione

2,2''-dimethyl-5'-phenyl-1H-isoindole-1-spiro-2'-[1',4']dithiane-3'-spiro-1''-1''H-isoindole-3,3''-(2H,2''H)-dione