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| NO. | Name | CAS No. |
| 1 | Boc-Glycine | 4530-20-5 |
| 2 | Boc-L-Tyrosine methyl ester | 4326-36-7 |
| 3 | Boc-L-Tyrosine ethyl ester | 72594-77-5 |
| 4 | Boc-L-Pyroglutamic acid methyl ester | 108963-96-8 |
| 5 | Boc-L-Pyroglutamic acid ethyl ester | 144978-12-1 |
| 6 | 1-Boc-D-Pyroglutamic Acid ethyl ester | 144978-35-8 |
