| NO. | Name | CAS No. |
| 21 | L-Proline | 147-85-3 |
| 22 | D-Phenylalanine methyl ester hydrochloride | 13033-84-6 |
| 23 | L-Tyrosine | 60-18-4 |
| 24 | L-Serine methyl ester hydrochloride | 5680-80-8 |
| 25 | L-Alanine ethyl ester hydrochloride | 1115-59-9 |
| 26 | L-Alanine | 25281-63-4 |
| 27 | L-Lysine | 56-87-1 |
| 28 | L-Threonine | 72-19-5 |
| 29 | L-Methionine | 63-68-3 |
| 30 | L-Isoleucine | 73-32-5 |
| 31 | L-Serine | 56-45-1 |
| 32 | L-Theanine | 3081-61-6 |
| 33 | L-Citrulline | 372-75-8 |
| 34 | L-Cystine | 56-89-3 |
| 35 | L-Cysteine | 52-90-4 |
| 36 | D-(+)-Tryptophan | 153-94-6 |
| 37 | D-Proline | 344-25-2 |
| 38 | (R)-Phenylalanine | 673-06-3 |
| 39 | D-SERINE | 312-84-5 |
| 40 | D-Alanine | 338-69-2 |