| NO. | Name | CAS No. |
| 21 | S-Carboxymethyl-L-Cysteine | 638-23-3 |
| 22 | N-Acetyl-L-Tryosine | 537-55-3 |
| 23 | DL-Homocysteinethiolactone Hydrochloride | 6038-19-3 |
| 24 | L-Lysine Hydrochloride | 657-27-2 |
| 25 | L-Lysine-L-Aspartate | 27348-32-9 |
| 26 | L-Lysine L-Glutamate | 5408-52-6 |
| 27 | L-Citrulline DL-Malate | 54940-97-5（70796-17-7） |