Kushenol A

Catalog No. Size PriceQuantity
M13402-2 2mg solid $90
M13402-10 10mg solid $270


Kushenol A (Leachianone E) is isolated from the root of Sophora flavescent. Kushenol A is a non-competitive tyrosinase inhibitor to block the conversion of L-tyrosine to L-DOPA, shows IC50 and Kivalues of 1.1 μM and 0.4 μM, respectively. Kushenol A is a flavonoid antioxidant, has inhibitory effects on alpha-glucosidase (IC50: 45 μM; Ki: 6.8 μM) and β-amylase. Kushenol A is confirmed as potential inhibitors of enzymes targeted by cosmetics for skin whitening and aging.

Product information

CAS Number: 99217-63-7

Molecular Weight: 408.49

Formula: C25H28O5


Leachianone E

Chemical Name: (2S)-5,7-dihydroxy-2-(2-hydroxyphenyl)-8-[(2R)-5-methyl-2-(prop-1-en-2-yl)hex-4-en-1-yl]-3,4-dihydro-2H-1-benzopyran-4-one

Smiles: CC(C)=CC[C@H](CC1=C2O[C@@H](CC(=O)C2=C(O)C=C1O)C1=CC=CC=C1O)C(C)=C


InChi: InChI=1S/C25H28O5/c1-14(2)9-10-16(15(3)4)11-18-20(27)12-21(28)24-22(29)13-23(30-25(18)24)17-7-5-6-8-19(17)26/h5-9,12,16,23,26-28H,3,10-11,13H2,1-2,4H3/t16-,23+/m1/s1

Technical Data

Appearance: Solid Power

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

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

Kushenol A (25 μM) exhibits a highly potent inhibitory activity on ABTS+ radical scavenging with an IC50 value of 9.7 ± 0.1 μM, and exhibits inhibits scavenging activity as a percentage 93.7% at 25 μM. Kushenol A (0-60 μg/ml; 24 hours) shows considerable cytotoxic effects against NSCLC cells, exhibits IC50 values of 5.3 μg/ml and 20.5 μg/ml for A549 and NCI‐H226 cells, respectively. It shows an IC50 value of 57.2 μg/ml for BEAS-2B cells.


  1. Kim JH, et al. Kushenol A and 8-prenylkaempferol, tyrosinase inhibitors, derived from Sophora flavescens. J Enzyme Inhib Med Chem. 2018 Dec;33(1):1048-1054.
  2. Kim JH, et al. Glycosidase inhibitory flavonoids from Sophora flavescens. Biol Pharm Bull. 2006 Feb;29(2):302-5.

Products are for research use only. Not for human use.

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