(R)-alpha-Amino-2,3-dihydro-3-oxo-5-phenyl-4-isoxazolepropanoic acid 154420-28-7 2-Amino-3-(3-hydroxy-5-phenylisoxazol-4-yl)propionic acid 4-Isoxazolepropanoic acid, alpha-amino-2,3-dihydro-3-oxo-5-phenyl-, (R)- Appa-(R,S)