4'-amino-3'-(((E)-hex-2-en-1-ylidene)amino)-1,3-dioxo-2'-(phenylimino)-1,2',3,3'-tetrahydrospiro[indene-2,6'-[1,3]thiazine]-5'-carbonitrile

4'-amino-3'-((2-methylpropylidene)amino)-1,3-dioxo-2'-(phenylimino)-1,2',3,3'-tetrahydrospiro[indene-2,6'-[1,3]thiazine]-5'-carbonitrile

3-phenyl-1-(((E)-3-phenylallylidene)amino)-2-thioxo-2,3-dihydroindeno[1,2-d]imidazol-8(1H)-one

4'-amino-1,3-dioxo-3'-(((E)-3-phenylallylidene)amino)-2'-(phenylimino)-1,2',3,3'-tetrahydrospiro[indene-2,6'-[1,3]thiazine]-5'-carbonitrile