If protecting groups were used to protect specific functional groups in the α-amino acids, they are removed at this stage.
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N-Tosyl-α-aminocrotonsaeureaethylester
rac-2-Chloro-3,4-dihydro-2,5,7,8-tetramethyl-6-(phenylmethoxy)-2H-1-benzopyran
8-p-tolylsulphonylmethyl-des-AB-cholest-8-ene
tert-butyldimethylsilyl 2-azido-2-deoxy-4,6-O-isopropylidene-3-O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl)-β-D-galactopyranoside
1,4-bis<(propylamino)methyl>benzene
7-goniofufurone
