H 261 structure

H 261

(2S)-2-[[(2R,3S)-2-[[(2S,4S,5S)-5-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-4-hydroxy-7-methyl-2-propan-2-yloctanoyl]amino]-3-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid

Also Known As: H 261 Oligopeptide|H-261 Oligopeptide|his-pro-phe-his-leu(OH)-val-ile-his|H 261|H-261|H261|T-Boc-His-Pro-Phe-His-Leu(OH)-Val-Ile-His|(2S)-2-[[(2R,3S)-2-[[(2S,4S,5S)-5-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-4-hydroxy-7-methyl-2-propan-2-yloctanoyl]amino]-3-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid|L-Histidine, L-histidyl-L-prolyl-L-phenylalanyl-L-histidyl-(2S,4S,5S)-5-amino-4-hydroxy-7-methyl-2-(1-methylethyl)octanoyl-L-isoleucyl-|L-Histidine, N-(N-(5-((N-(N-(1-L-histidyl-L-prolyl)-L-phenylalanyl)-L-histidyl)amino)-4-hydroxy-7-methyl-2-(1-methylethyl)-1-oxooctyl)-L-isoleucyl)-, (2S-(2R*,4R*,5R*))-|l-histidyl-l-prolyl-l-phenylalanyl-n-[(4s,5s,7s)-7-{[(2r,3s)-1-{[(1s)-1-carboxy-2-(1h-imidazol-4-yl)ethyl]amino}-3-methyl-1-oxopentan-2-yl]carbamoyl}-5-hydroxy-2,8-dimethylnonan-4-yl]-l-histidinamide

CAS: 97451-34-8
Molecular Formula C50H73N13O9
Molecular Weight 999.5654 g/mol
LogP 0.4
Topological Polar Surface Area 335.0 Ų
Hydrogen Bond Donors 11
Hydrogen Bond Acceptors 13
Rotatable Bonds 28
Exact Mass 999.5654
Monoisotopic Mass 999.5654
Heavy Atoms 72
Complexity 1790.0

Chemical Identifiers

CAS Number 97451-34-8
SMILES CC[C@H](C)[C@H](C(=O)N[C@@H](CC1=CN=CN1)C(=O)O)NC(=O)[C@@H](C[C@@H]([C@H](CC(C)C)NC(=O)[C@H](CC2=CN=CN2)NC(=O)[C@H](CC3=CC=CC=C3)NC(=O)[C@@H]4CCCN4C(=O)[C@H](CC5=CN=CN5)N)O)C(C)C
InChIKey UGJSFMSTPAPJJO-FWHCSXHRSA-N

Product Overview

H 261 (CAS 97451-34-8), with molecular formula C50H73N13O9 and molecular weight 999.5654 g/mol. IUPAC: (2S)-2-[[(2R,3S)-2-[[(2S,4S,5S)-5-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]pyrrolidine-2-carbonyl]amino]-3-phenylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-4-hydroxy-7-methyl-2-propan-2-yloctanoyl]amino]-3-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid.

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Safety Data Sheet (MSDS / SDS) View the Laboratory Chemical Safety Summary (LCSS) on PubChem — includes GHS classifications, hazard statements, first aid measures, and handling precautions.
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