tert-butyl N-[4-(piperazin-1-yl)butyl]carbamate tmp 67 SMILES CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)CCCN=[N+]=[N-])C(C)(C)C)C=C1 Purity (HPLC)

67 SMILES CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)CCCN=[N+]=[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

196 SMILES: [2H]C([2H])([2H])C(=O)C1=CC=C(C)C=C1 Isotopic Enrichment: 98 atom % D Purity (HPLC): ≥ 95% Shipping Conditions: room temperature Storage Conditions: Refrigerated Regulatory Statement: For Research Use Only

Product Name Mal-Propionyl-PEG8-Gly-Gly-Phe-Gly-PAB(m-PEG4)-MMAE Synonyms CAS Number Related CAS Molecular Formula C98H153N13O30 Molecular Weight 1993

029 Purity (HPLC) >= 95% Solubility DMSO

tert-butyl N-[4-(piperazin-1-yl)butyl]carbamate tmp 67 SMILES CC1=C(SC=N1)C1=CC=C(CNC(=O)[C@@H]2C[C@@H](O)CN2C(=O)[C@@H](NC(=O)CCCN=[N+]=[N-])C(C)(C)C)C=C1 Purity (HPLC)Nitrogen Heterocycle Based Linker (NHBL). Binfunctional amine amine linker. Product Name tert butyl N [4 (piperazin 1 yl)butyl]carbamate Synonyms 1 (4 Boc aminobutyl)piperazine CAS Number 874831 61 5 Related CAS Molecular Formula C13H27N3O2 Molecular Weight 257. 378 SMILES CC(C)(C)OC(=O)NCCCCN1CCNCC1 Purity (HPLC) >= 95% Shipping Conditions Room temperature Storage Conditions Refrigerated Shelf Life 12 months after the date of delivery Regulatory