1H-Pyrrolo(2,3-b)pyridine-3-propanoic acid, alpha-amino-, (+-)- (9CI) 1H-Pyrrolo(2,3-b)pyridine-3-propanoic acid, alpha-amino-, (-)- 1H-Pyrrolo(2,3-b)pyridine-3-propionic acid, alpha-amino-, dl- 7-aza-Tryptophan 7303-50-6 NSC 19495