Propargyl-Gly(m-PEG4)-Val-Cit-PAB(m-PEG8)-MMAE Size:5mg CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](N)C(C)(C)C)C=C1 Purity (HPLC) >= 95%

CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](N)C(C)(C)C)C=C1 Purity (HPLC) >= 95% Shipping Conditions Room temperature Storage Conditions Refrigerated Shelf Life 12 months after the date of delivery Regulatory Statement For Research Use Only

48 Purity (HPLC) >= 95% Physical Appearance Dark Blue Solid Optical Properties Abs/Em Maxima: 650/660nm Solubility DMSO

NCCOCCOCC#CC1=CC=C2C(=O)N(C3CCC(=O)NC3=O)C(=O)C2=C1 Purity (HPLC) >= 95% Shipping Conditions Room temperature Storage Conditions Refrigerated Shelf Life 12 months after the date of delivery Regulatory Statement For Research Use Only

361 SMILES O=C(CCCC#C)NC1=C2C(=O)N(C3CCC(=O)NC3=O)C(=O)C2=CC=C1 Purity (HPLC) >= 95% Shipping Conditions Room temperature Storage Conditions Refrigerated Shelf Life 12 months after the date of delivery Regulatory Statement For Research Use Only

Product Name DBCO-Dap(m-PEG4)-Val-Cit-PAB(m-PEG8) Synonyms CAS Number Related CAS Molecular Formula C68H101N9O21 Molecular Weight 1380

Propargyl-Gly(m-PEG4)-Val-Cit-PAB(m-PEG8)-MMAE Size:5mg CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](N)C(C)(C)C)C=C1 Purity (HPLC) >= 95%SOLU KNEX cleavable linker features a Val Cit dipeptide. In this product, a Propargyl Gly(m PEG4) moiety replaces the conventional maleimidocaproyl (MC) unit to enhance aqueous solubility. The propargyl functional group is widely employed in click chemistry to undergo selective cycloaddition with azides. Additionally, m PEG8 is attached to the commonly used self immolative para aminobenzyl (PAB) moiety to further increase aqueous solubility. The