Structures of the antileprosy phenazine derivatives B673 and B741: 3-(p-chloroanilino)-10-(p-chlorophenyl)-2-cyclohexylimino-2,10-dihydrophenazine,C30H26Cl2N4, and 3-(p-chloroanilino)-10-(p-chlorophenyl)-2,10-dihydro-2-(4-methylcyclohexylimino)phenazine,C31H28Cl2N4 |