115464-65-8 5,11-Dimethyl-9-methoxy-N-propyl-6H-pyrido(4,3-b)carbazol-1-amine maleate 6H-Pyrido(4,3-b)carbazol-1-amine, 5,11-dimethyl-9-methoxy-N-propyl-, (Z)-2-butenedioate (1:1)