(+-)-alpha-Aminopyrazolo(1,5-a)pyridine-3-propanoic acid 117782-75-9 2-Amino-3-(pyrazolo(1,5-a)pyridin-3-yl)propionic acid 8-Azatryptophan Pyrazolo(1,5-a)pyridine-3-propanoic acid, alpha-amino-, (+-)-