Peptide Synthesis Intermediate Structure - Fmoc-Lys(Alloc)-OH Derivative with p-Nitrophenyl Ester #1530885 (License: Personal Use)

This image displays a complex organic molecule used in peptide synthesis: an Fmoc-protected amino acid derivative with a lysine side chain bearing a secondary amine, linked via a spacer to a p-nitrophenyl ester group. Key features include the Fmoc (fluorenylmethyloxycarbonyl) N-terminal protecting group, a chiral α-carbon center, and an activated ester for nucleophilic acyl substitution. The structure enables selective deprotection and stepwise elongation in SPPS (solid-phase peptide synthesis).

Used in pharmaceutical chemistry and bioconjugation workflows; commonly appears in research articles, synthetic protocols, or product catalogs for custom peptide synthesis reagents. Matches user intent for identifying or sourcing specialty amino acid derivatives.