(2R)-3-phenyl-2-(pyrazine-2-carbonylamino)propanoic acid; (Pyrazine-2-carbonyl)-D-phenylalanine; (2R)-3-Phenyl-2-(pyrazine-2-carbonylamino)propanoic Acid; (R)-3-Phenyl-2-(pyrazine-2-carboxamido)propanoic Acid; N-(2-Pyrazinylcarbonyl)-D-phenylalanine