Azide-PEG4-VC-PAB-Doxorubicin

• CAT Number: I045867
• Molecular Formula: C57H75N9O21
• Molecular Weight: 1222.25
• Purity: ≥95%
• Synonyms: [4-[[(2S)-2-[[(2S)-2-[3-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]propanoylamino]-3-methylbutanoyl]amino]-5-(carbamoylamino)pentanoyl]amino]phenyl]methyl N-[(2S,3S,4S,6R)-3-hydroxy-2-methyl-6-[[(1S,3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-2,4-dihydro-1H-tetracen-1-yl]oxy]oxan-4-yl]carbamate
• InChI: InChI=1S/C57H75N9O21/c1-30(2)47(65-41(69)14-17-81-19-21-83-23-24-84-22-20-82-18-16-61-66-59)54(76)63-36(8-6-15-60-55(58)77)53(75)62-33-12-10-32(11-13-33)29-85-56(78)64-37-25-42(86-31(3)48(37)70)87-39-27-57(79,40(68)28-67)26-35-44(39)52(74)46-45(50(35)72)49(71)34-7-5-9-38(80-4)43(34)51(46)73/h5,7,9-13,30-31,36-37,39,42,47-48,67,70,72,74,79H,6,8,14-29H2,1-4H3,(H,62,75)(H,63,76)(H,64,78)(H,65,69)(H3,58,60,77)/t31-,36-,37-,39-,42-,47-,48+,57-/m0/s1
• InChIKey: SRKJKGKXNXYJQK-KMKKCVBPSA-N
• SMILES: C[C@H]1[C@H]([C@H](C[C@@H](O1)O[C@H]2C[C@@](CC3=C2C(=C4C(=C3O)C(=O)C5=C(C4=O)C(=CC=C5)OC)O)(C(=O)CO)O)NC(=O)OCC6=CC=C(C=C6)NC(=O)[C@H](CCCNC(=O)N)NC(=O)[C@H](C(C)C)NC(=O)CCOCCOCCOCCOCCN=[N+]=[N-])O

Azide-PEG4-VC-PAB-Doxorubicin（Cat No.:I045867）is a cleavable linker–drug construct designed for antibody–drug conjugate (ADC) and targeted delivery applications. It features an azide group for bioorthogonal conjugation via click chemistry, a PEG4 spacer to enhance solubility and flexibility, and a valine-citrulline (VC) dipeptide linker with a p-aminobenzyl (PAB) self-immolative spacer. Upon protease-mediated cleavage, active doxorubicin, a DNA-intercalating cytotoxic agent, is efficiently released at the tumor site. This modular design enables precise conjugation, controlled drug release, and the development of next-generation ADC-based therapeutic strategies.