Z-Ser-NHNH2 is a serine-derived amino acid derivative featuring the side chain of serine (hydroxymethyl group) attached to an amino acid backbone bearing a hydrazide functionality (-NHNH2) at the carboxyl-derived position. The molecule is N-protected with a benzyloxycarbonyl (Z, Cbz) group on the amino terminus, and it contains both an amino group within the hydrazide and the serine side-chain hydroxyl, enabling hydrogen-bonding and chemoselective reactivity under peptide-chemistry conditions. Z-Ser-NHNH2 is used as a precursor for preparing hydrazide-containing amino acid derivatives and as a building block for chemical labeling, hydrazone/condensation-based conjugation strategies, and structure-activity studies involving serine side-chain functionality.
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