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Boc-Val-OH (N-(tert-Butoxycarbonyl)-L-valine) is a Boc-protected derivative of the essential branched-chain amino acid L-valine. The molecule consists of a valine core with its α-amino group protected by a tert-butoxycarbonyl (Boc) group, while the carboxylic acid remains free for coupling reactions. This protection strategy renders the amino group inert under basic and nucleophilic conditions while allowing selective deprotection under acidic conditions (typically TFA).

Boc-Arg-OH·H₂O·HCl (Nα-(tert-butoxycarbonyl)-L-arginine hydrochloride monohydrate) is a protected arginine derivative featuring a tert-butoxycarbonyl (Boc) group protecting the α-amino group, presented as the hydrochloride salt monohydrate. The molecule consists of an L-arginine backbone with the α-amino group masked by the Boc carbamate, the guanidinium side chain intact, and the carboxylic acid presented as the free acid.

Boc-Cys(Acm)-OH (Boc-S-acetamidomethyl-L-cysteine) is a doubly protected cysteine derivative featuring a tert-butoxycarbonyl (Boc) group protecting the α-amino group and an acetamidomethyl (Acm) group protecting the thiol side chain. The molecule consists of an L-cysteine backbone with the α-amino group masked by the Boc carbamate and the thiol functionality protected as an S-acetamidomethyl thioether.

Boc-4-chloroaniline (tert-butyl N-(4-chlorophenyl)carbamate) is a protected aniline derivative featuring a tert-butoxycarbonyl (Boc) group attached to the nitrogen of 4-chloroaniline. The molecule consists of a para-chlorinated benzene ring connected to a carbamate moiety, where the Boc group serves as a robust protecting group for the aniline nitrogen.

Boc-Gly-OH (N-tert-Butoxycarbonylglycine) is the simplest N-Boc-protected amino acid, featuring a glycine backbone with a Boc (tert-butoxycarbonyl) protecting group attached to the α-amino group. The molecule consists of a glycine residue — the smallest and most conformationally flexible amino acid — with the Boc group providing temporary protection of the amino functionality during peptide synthesis.

Z-D-Lys(Boc)-OH (Nα-Benzyloxycarbonyl-Nε-tert-butoxycarbonyl-D-lysine) is a doubly protected D-lysine derivative featuring an N-terminal Z (benzyloxycarbonyl) protecting group and an Nε-Boc (tert-butoxycarbonyl) protecting group on the side-chain amino group.