Fmoc-D-Val-D-Cit-PAB

• CAT Number: I045052
• CAS Number: 1350456-69-7
• Molecular Formula: C33H39N5O6
• Molecular Weight: 601.69
• Purity: ≥95%
• Synonyms: 9H-fluoren-9-ylmethyl N-[(2R)-1-[[(2R)-5-(carbamoylamino)-1-[4-(hydroxymethyl)anilino]-1-oxopentan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]carbamate
• InChI: InChI=1S/C33H39N5O6/c1-20(2)29(38-33(43)44-19-27-25-10-5-3-8-23(25)24-9-4-6-11-26(24)27)31(41)37-28(12-7-17-35-32(34)42)30(40)36-22-15-13-21(18-39)14-16-22/h3-6,8-11,13-16,20,27-29,39H,7,12,17-19H2,1-2H3,(H,36,40)(H,37,41)(H,38,43)(H3,34,35,42)/t28-,29-/m1/s1
• InChIKey: DALMAZHDNFCDRP-FQLXRVMXSA-N
• SMILES: CC(C)[C@H](C(=O)N[C@H](CCCNC(=O)N)C(=O)NC1=CC=C(C=C1)CO)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24

Fmoc-D-Val-D-Cit-PAB（Cat No.:I045052）is a protected dipeptide linker commonly used in the synthesis of antibody-drug conjugates (ADCs) and targeted drug delivery systems. It features D-valine and D-citrulline residues joined to a para-aminobenzyl (PAB) self-immolative spacer, with an Fmoc (9-fluorenylmethyloxycarbonyl) group protecting the N-terminus for solid-phase peptide synthesis. This cleavable linker is designed for enzymatic release, typically by cathepsin B, within tumor microenvironments, allowing site-specific payload activation. Fmoc-D-Val-D-Cit-PAB is a versatile component for constructing cleavable, stable, and tumor-selective therapeutic conjugates.