.alpha.-Amino-.delta.-ureidovaleric acid .delta.-Ureidonorvaline 372-75-8 CITRULLINE,(L) Cit Citrulline L-Citrulline L-Cytrulline L-Ornithine, N5-(aminocarbonyl)- N(.delta.)-Carbamylornithine N.delta.-Carbamylornithine N5-Carbamoyl-L-ornithine NSC27425 Ornithine, N5-carbamoyl-, L- Sitrulline