| 1 | L-leuzin |
| 2 | (s)-leucine |
| 3 | (s)-(+)-leucine |
| 4 | L-leucin |
| 5 | (2s)-2-amino-4-methylpentanoic acid |
| 6 | Leu |
| 7 | L |
| 8 | (2s)-alpha-2-amino-4-methylvaleric acid |
| 9 | (2s)-alpha-leucine |
| 10 | 2-amino-4-methylvaleric acid |
| 11 | Leucine |
| 12 | Leucine zwitterion |
| 13 | (2s)-2-azaniumyl-4-methylpentanoate |