131883-55-1 187112-40-9 479-73-2 569-61-9 6035-94-5 61467-64-9 70426-60-7 Benzenamine, 4-((4-aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl)- C.I. Basic Red 9 CI Basic red 9 Homolka's Base