. . . "experimental"@en . . . . . "(S)-2-Amino-3-(1,3,5,7-Pentahydro-2,4-Dioxo-Cyclopenta[E]Pyrimidin-1-Yl) Proionic Acid"@en . . . . . . . . . . . . . . . . . . . . . . . . . . .