abstract |
Dinitro-diphenylamine cpds. of formula (I) and their salts are new: one of R1 and R2 = NO2, the other is SO3H or COOH; one of R3 and R4 = H, the other is NR5R6; R5 and R6 = H, 1-4C alkyl or 2-4C hydroxyalkyl. More specifically NR5R6 = NH2 or 2-hydroxyethylamino. |