KS I

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 584527

CAS#: 130752-21-5

Description: KS I is a gonadotropin antagonist and is a cyclolignan isolated from extracts of Lycopus and Lithosperum after oxidation with caffeic acid.


Chemical Structure

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KS I
CAS# 130752-21-5

Theoretical Analysis

MedKoo Cat#: 584527
Name: KS I
CAS#: 130752-21-5
Chemical Formula: C18H14O8
Exact Mass: 358.07
Molecular Weight: 358.302
Elemental Analysis: C, 60.34; H, 3.94; O, 35.72

Price and Availability

This product is not in stock, which may be available by custom synthesis. For cost-effective reason, minimum order is 1g (price is usually high, lead time is 2~3 months, depending on the technical challenge). Quote less than 1g will not be provided. To request quote, please email to sales @medkoo.com or click below button.
Note: Price will be listed if it is available in the future.

Request quote for custom synthesis

Synonym: KS I; KSI; KS-I

IUPAC/Chemical Name: 2,3-Naphthalenedicarboxylic acid, 1-(3,4-dihydroxyphenyl)-1,2-dihydro-6,7-dihydroxy-

InChi Key: WJMFXQBNYLYADA-UHFFFAOYSA-N

InChi Code: InChI=1S/C18H14O8/c19-11-2-1-7(4-12(11)20)15-9-6-14(22)13(21)5-8(9)3-10(17(23)24)16(15)18(25)26/h1-6,15-16,19-22H,(H,23,24)(H,25,26)

SMILES Code: O=C(C1C(C2=CC=C(O)C(O)=C2)C3=C(C=C(O)C(O)=C3)C=C1C(O)=O)O

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.03.00

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 358.30 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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9: Zankov DP, Toyoda F, Omatsu-Kanbe M, Matsuura H, Horie M. Angiotensin II type 1 receptor mediates partially hyposmotic-induced increase of I (Ks) current in guinea pig atrium. Pflugers Arch. 2009 Sep;458(5):837-49. doi: 10.1007/s00424-009-0669-8. Epub 2009 Apr 29. PubMed PMID: 19404674.

10: Lee HA, Kim KS, Park SJ, Kim EJ. Cellular mechanism of the QT prolongation induced by sulpiride. Int J Toxicol. 2009 May-Jun;28(3):207-12. doi: 10.1177/1091581809337261. PubMed PMID: 19546258.

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16: Serraino D, Cerimele D, Piselli P, Aztori L, Farchi F, Carletti F, Navarra A, Masala MV, Rezza G. Infection with human herpesvirus type 8 and Kaposi's sarcoma in Sardinia. Infection. 2006 Feb;34(1):39-42. PubMed PMID: 16501902.

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18: Torres-Jacome J, Gallego M, Rodríguez-Robledo JM, Sanchez-Chapula JA, Casis O. Improvement of the metabolic status recovers cardiac potassium channel synthesis in experimental diabetes. Acta Physiol (Oxf). 2013 Mar;207(3):447-59. doi: 10.1111/apha.12043. Epub 2012 Dec 27. PubMed PMID: 23181465.

19: Surti TS, Huang L, Jan YN, Jan LY, Cooper EC. Identification by mass spectrometry and functional characterization of two phosphorylation sites of KCNQ2/KCNQ3 channels. Proc Natl Acad Sci U S A. 2005 Dec 6;102(49):17828-33. Epub 2005 Nov 30. PubMed PMID: 16319223; PubMed Central PMCID: PMC1297712.

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