127654-20-0 5-(5-Carboxypentylidene)-5H-10,11-dihydropyrido(3,4-c)(1)benzazepin 6-(10,11-Dihydro-5H-pyrido(3,4-c)(1)benzazepin-5-ylidene)hexanoic acid Hexanoic acid, 6-(10,11-dihydro-5H-pyrido(3,4-c)(1)benzazepin-5-ylidene)-