| NO. | Name | CAS No. |
| 21 | L-Cystine | 56-89-3 |
| 22 | L-Cysteine | 52-90-4 |
| 23 | D-(+)-Tryptophan | 153-94-6 |
| 24 | D-Proline | 344-25-2 |
| 25 | (R)-Phenylalanine | 673-06-3 |
| 26 | D-SERINE | 312-84-5 |
| 27 | D-Alanine | 338-69-2 |
| 28 | D-(-)-Arginine | 157-06-2 |
| 29 | D-Lysine Hydrochloride | 7274-88-6 |
| 30 | D-Threonine | 632-20-2 |
| 31 | D(-)-Aspartic acid | 1783-96-6 |
| 32 | D-(-)-2,5-Diaminopentanoic acid hydrochloride | 16682-12-5 |
| 33 | DL-Phenylalanine | 150-30-1 |
| 34 | DL-Serine | 302-84-1 |
| 35 | DL-Tryptophan | 54-12-6 |
| 36 | DL-lysine | 70-54-2 |
| 37 | DL-Leucine | 328-39-2 |
| 38 | DL-Glutamic Acid | 617-65-2 |
| 39 | DL-Glutamine | 6899-04-3 |
| 40 | DL-Tyrosine | 556-03-6 |