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YS 51

Catalog No. T35280   CAS 213179-96-5
Synonyms: YS51, YS-51

YS 51 is a biochemical.

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YS 51, CAS 213179-96-5
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Purity: 98%
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Biological Description
Chemical Properties
Storage & Solubility Information
Description YS 51 is a biochemical.
Synonyms YS51, YS-51
Molecular Weight 386.289
Formula C20H20BrNO2
CAS No. 213179-96-5


Powder: -20°C for 3 years | In solvent: -80°C for 2 years

Solubility Information

( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Park EJ, Kim YM, Kim HJ, Jang SY, Oh MH, Lee DH, Chang KC. (S)YS-51, a novel isoquinoline alkaloid, attenuates obesity-associated non-alcoholic fatty liver disease in mice by suppressing lipogenesis, inflammation and coagulation. Eur J Pharmacol. 2016 Oct 5;788:200-209. doi: 10.1016/j.ejphar.2016.06.040. Epub 2016 Jun 23. PubMed PMID: 27343380. 2. Franjoine SE, Bedaiwy MA, AbdelHafez FF, Geng C, Liu JH. Clinical Effectiveness of Modified Laparoscopic Fimbrioplasty for the Treatment of Minimal Endometriosis and Unexplained Infertility. Minim Invasive Surg. 2015;2015:730513. doi: 10.1155/2015/730513. Epub 2015 May 6. PubMed PMID: 26064680; PubMed Central PMCID: PMC4438181. 3. Chaea HJ, Kim HR, Kang YJ, Hyun KC, Kim HJ, Seo HG, Lee JH, Yun-Choi HS, Chang KC. Heme oxygenase-1 induction by (S)-enantiomer of YS-51 (YS-51S), a synthetic isoquinoline alkaloid, inhibits nitric oxide production and nuclear factor-kappaB translocation in ROS 17/2.8 cells activated with inflammatory stimulants. Int Immunopharmacol. 2007 Dec 5;7(12):1559-68. Epub 2007 Aug 14. PubMed PMID: 17920533. 4. Heo JM, Kim HJ, Ha YM, Park MK, Kang YJ, Lee YS, Seo HG, Lee JH, Yun-Choi HS, Chang KC. YS 51, 1-(beta-naphtylmethyl)-6,7-dihydroxy-1,2,3,4,-tetrahydroisoquinoline, protects endothelial cells against hydrogen peroxide-induced injury via carbon monoxide derived from heme oxygenase-1. Biochem Pharmacol. 2007 Nov 1;74(9):1361-70. Epub 2007 Jul 21. PubMed PMID: 17719563.

Dose Conversion

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Molarity Calculator
Dilution Calculator
Reconstitution Calculation
Molecular Weight Calculator

Molarity Calculator allows you to calculate the

  • Mass of a compound required to prepare a solution of known volume and concentration
  • Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Concentration of a solution resulting from a known mass of compound in a specific volume
See Example

An example of a molarity calculation using the molarity calculator
What is the mass of compound required to make a 10 mM stock solution in 10 ml of water given that the molecular weight of the compound is 197.13 g/mol?
Enter 197.13 into the Molecular Weight (MW) box
Enter 10 into the Concentration box and select the correct unit (millimolar)
Enter 10 into the Volume box and select the correct unit (milliliter)
Press calculate
The answer of 19.713 mg appears in the Mass box


Calculator the dilution required to prepare a stock solution

Calculate the dilution required to prepare a stock solution
The dilution calculator is a useful tool which allows you to calculate how to dilute a stock solution of known concentration. Enter C1, C2 & V2 to calculate V1.

See Example

An example of a dilution calculation using the Tocris dilution calculator
What volume of a given 10 mM stock solution is required to make 20ml of a 50 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=50 μM, V2=20 ml and V1 is the unknown:
Enter 10 into the Concentration (start) box and select the correct unit (millimolar)
Enter 50 into the Concentration (final) box and select the correct unit (micromolar)
Enter 20 into the Volume (final) box and select the correct unit (milliliter)
Press calculate
The answer of 100 microliter (0.1 ml) appears in the Volume (start) box


Calculate the volume of solvent required to reconstitute your vial.

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial.
Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Enter the chemical formula of a compound to calculate its molar mass and elemental composition

Tip: Chemical formula is case sensitive: C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed n the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.


Tech Support

Please see Inhibitor Handling Instructions for more frequently ask questions. Topics include: how to prepare stock solutions, how to store products, and cautions on cell-based assays & animal experiments, etc.


YS 51 213179-96-5 YS51 YS-51 inhibitor inhibit