Synonyms: DS 511 (4'-OH);AC1NUSWT;DS-511(4'-OH);DS-511 (4'-OH);1,4-Dimorpholino-7-(4-hydroxyphenyl)pyrido(3,4-d)pyridazine;Phenol, 4-(1,4-di-4-morpholinylpyrido(3,4-d)pyridazin-7-yl)-;4-(1,4-dimorpholin-4-yl-6H-pyrido[3,4-d]pyridazin-7-ylidene)cyclohexa-2,5-dien-1-one;57696-55-6