An Fmoc-protected valine glycation building block for solid-phase peptide synthesis (SPPS). The Nα-Fmoc group is removed under standard piperidine conditions during chain elongation, while the free α-carboxylic acid couples to the resin-bound peptide. This is an Amadori-rearrangement (fructosamine) building block in which valine is modified with a fructose-derived adduct, used to synthesize peptides modeling early non-enzymatic glycation and advanced glycation end-product (AGE) chemistry.