Propargyl-Gly(m-PEG4)-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP halotag 404 SMILES CN1C(=O)C(C)=C2N(C(=O)N(C3CC3)C(=O)C2=C1NC1=C(F)C=C(I)C=C1)C1=CC(NC(C)=O)=CC=C1 Purity (HPLC)

404 SMILES CN1C(=O)C(C)=C2N(C(=O)N(C3CC3)C(=O)C2=C1NC1=C(F)C=C(I)C=C1)C1=CC(NC(C)=O)=CC=C1 Purity (HPLC) >= 95% Physical Appearance White solid Solubility DMSO

092 SMILES CC(C)(C)OC(=O)CN1CCN(CC(=O)NCCOCCOCCOCCOCCOCCN=[N+]=[N-])CCN(CC(=O)OC(C)(C)C)CCN(CC(=O)OC(C)(C)C)CC1 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

CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)COCCOCCOCCOCCN)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

Product Name Azide-Hexanoyl-Val-Cit-PAB(m-PEG8) Synonyms CAS Number Related CAS Molecular Formula C42H73N9O14 Molecular Weight 928

emission maximum = 660 nm

Propargyl-Gly(m-PEG4)-Gly-Gly-Phe-Gly-PAB(m-PEG4)-PNP halotag 404 SMILES CN1C(=O)C(C)=C2N(C(=O)N(C3CC3)C(=O)C2=C1NC1=C(F)C=C(I)C=C1)C1=CC(NC(C)=O)=CC=C1 Purity (HPLC)SOLU KNEX cleavable linker features a Gly Gly Phe Gly (GGFG) peptide. 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 PEG4 is attached to the commonly used self immolative para aminobenzyl (PAB) moiety to further increase aqueous