11-(5-Carboxypentylidene)-9-methoxy-6-methyl-5,11-dihydropyrido(4,3-c)(1)benzazepin-5(6H)-one 127653-89-8 Hexanoic acid, 6-(5,6-dihydro-9-methoxy-6-methyl-5-oxo-11H-pyrido(4,3-c)(1)benzazepin-11-ylidene)-, monohydrate