4,4'-Sulfonylbis(benzene-1,2-diaMine)

1,2-diaMino-4-(3,4-diaMinophenyl)sulfonylbenzene

4-(3,4-diaminophenyl)sulfonylbenzene-1,2-diamine

2-amino-4-[(3,4-diaminophenyl)sulfonyl]phenylamine