| 1 | Dl-2-amino-5-ureidovaleric acid |
| 2 | Dl-citrulline |
| 3 | N(5)-(aminocarbonyl)-dl-ornithine |
| 4 | Cit |
| 5 | N(5)-carbamoyl-dl-ornithine |
| 6 | Citrulina |
| 7 | N(5)-(aminocarbonyl)ornithine |
| 8 | 2-amino-5-(carbamoylamino)pentanoic acid |
| 9 | N(5)-carbamoylornithine |
| 10 | Citrullin |
| 11 | 2-amino-5-uredovaleric acid |
| 12 | L-citrulline |
| 13 | (2s)-2-azaniumyl-5-(carbamoylamino)pentanoate |
| 14 | 2-amino-5-ureidovaleric acid |
| 15 | (2s)-2-amino-5-(carbamoylamino)pentanoic acid |
| 16 | N(delta)-carbamylornithine |
| 17 | Delta-ureidonorvaline |
| 18 | Alpha-amino-delta-ureidovaleric acid |
| 19 | N(5)-(aminocarbonyl)-l-ornithine |
| 20 | N(5)-carbamoyl-l-ornithine |
| 21 | N5-(aminocarbonyl)ornithine |
| 22 | N5-carbamoylornithine |
| 23 | L-2-amino-5-ureidovaleric acid |
| 24 | (s)-2-amino-5-ureidopentanoic acid |