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Home/Compounds/API/Leucine enkephalin
C28H37N5O7
555.6 g/mol
API

Leu-enkephalin

CAS58822-25-6EC261-457-1
Category
API
Compound Class
Peptide
Primary Use
Pharmaceutical Raw Material

Leu-enkephalin is a pentapeptide that functions as an active pharmaceutical ingredient. It is a highly flexible molecule containing multiple amide bonds and amino acid residues, commonly used in pharmaceutical research.

Pharmaceutical raw materialResearch compound for neuropeptide studies

Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.

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Related Compounds

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Referencesame scaffold

L-Tyrosine, L-lysyl-L-lysyl-L-lysyl-L-leucyl-L-arginyl-L-arginyl-L-glutaminyl-L-|A-glutamyl-L-alanyl-L-phenylalanyl-L-|A-aspartyl-L-alanyl-

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Customs Tariff Classification

The international HS code for Leu-enkephalin (CAS 58822-25-6) is 2924.29.

HS code (international, 6-digit)

2924.29

EU CN code (8-digit)

2924 29 70

Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.

Identifiers
IUPAC Name

(2S)-2-[[(2S)-2-[[2-[[2-[[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]amino]acetyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-4-methylpentanoic acid

InChIKey

URLZCHNOLZSCCA-VABKMULXSA-N

SMILES

CC(C)C[C@@H](C(=O)O)NC(=O)[C@H](CC1=CC=CC=C1)NC(=O)CNC(=O)CNC(=O)[C@H](CC2=CC=C(C=C2)O)N

Synonyms (38)
  • L-ENK
  • Dynorphin A (1-5)
  • Dynorphin-(1-5)
  • ENKEPHALIN, LEUCINE
  • Enkephalin
  • Enkephalin L
  • Enkephalins
  • H-Tyr-Gly-Gly-Phe-Leu-OH
  • L-Leucine-enkephalin acetate
  • L-Tyr-Gly-Gly-L-Phe-L-Leu
  • Leu-enkephalin
  • LeuENK
  • Leucyl-enkephalin
  • Tyr-Gly-Gly-Phe-Leu
  • Tyr-Gly-Gly-Phe-Leu-OH
  • Y-G-G-F-L
  • [5-Leucine]Enkephalin
  • [Leu5]-Enkephalin
  • leucine enkephalin

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