(RS)-N-4-chlorophenyl-N'-(6-formamido-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)thiourea
(RS)-N-3-chlorophenyl-N'-(6-formamido-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)thiourea
(RS)-N-4-cyanophenyl-N'-(6-formamido-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)thiourea
(RS)-N-3-cyanophenyl-N'-(6-formamido-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)thiourea
(RS)-N-4-chlorophenyl-N'-(6-amino-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)thiourea