Kyotorphin

Also known as: L-Tyrosyl-L-arginine, L-Tyr-L-Arg, YR, TYR-ARG, Dipeptide-1, Kiotorphin, (2S)-2-[[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]amino]-5-(diaminomethylideneamino)pentanoic acid, Nα-(L-Tyrosyl)-L-arginine

Kyotorphin (CAS 70904-56-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C15H23N5O4 and a molecular weight of 337.37400 g/mol. Key property: a density of 1.43 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 70904-56-2
Jingsj CID: J-1970911-8
Molecular Formula: C₁₅H₂₃N₅O₄
Molecular Weight: 337.37400 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Density	1.43 g/cm3
Exact Mass	337.17500
PSA	174.55000
LogP	1.37680

Activity & Biological Data

Additional Information	[1]. Takagi H, et al. Morphine-like analgesia by a new dipeptide, L-tyrosyl-L-arginine (Kyotorphin) and its analogue. Eur J Pharmacol. 1979;55(1):109-111.

Frequently Asked Questions

What is the CAS number of Kyotorphin?

The CAS number of Kyotorphin is 70904-56-2.

What are the molecular formula and molecular weight of Kyotorphin?

Kyotorphin has molecular formula C15H23N5O4 and molecular weight 337.37400 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Kyotorphin (CAS 70904-56-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1970911-8 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.