英文别名
                        2-benzyloxycarbonylamino-3-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-propionic acid;2-{[(Benzyloxy)carbonyl]amino}-3-(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-yl)propanoic acid;3-(2,4-dioxopyrimidin-1-yl)-2-(phenylmethoxycarbonylamino)propanoic acid