Pseudolaric Acid B

≥98% (HPLC)

(-)-Pseudolaric acid B, Pseudolarix acid B, O-Acetylpseudolaric acid C
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:

Quality Level

biological source

Larix kaempferi


≥98% (HPLC)


powder or crystals

storage condition

protect from light


white to off-white


methanol: 1 mg/mL, clear, colorless

storage temp.


SMILES string




InChI key


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1, 10 mg in glass bottle

Biochem/physiol Actions

Pseudolaric acid B, a natural diterpenoid compound, is isolated from Pseudolarix kaempferi. It has shown antifungal, antifertility, and antiangiogenic properties. It also may exihibit anti-cancer and anti-inflammatory properties.


Skull and crossbonesHealth hazard

Signal Word


Hazard Statements

Precautionary Statements


UN 2811 6.1 / PGIII

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Pauline Chiu et al.
Natural product reports, 27(7), 1066-1083 (2010-04-21)
The pseudolaric acids are diterpenoids isolated from the root bark of Pseudolarix amabilis, or the golden larch. Pseudolaric acids A and B are the major antifungal and anti-angiogenic congeners of this family of compounds. This review presents the results of...
Tan Li et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 45(5), 668-676 (2012-01-24)
Pseudolaric acid B (PAB) is a novel diterpenoid, isolated from Pseudolarix kaempferi Gorden, which roots are widely used to treat inflammatory and microbial skin diseases for centuries, but the underlying mechanism remains elusive. To address the immunoregulatory mechanisms of PAB...
Dandan Zhao et al.
Toxicology in vitro : an international journal published in association with BIBRA, 26(4), 595-602 (2012-03-06)
Pseudolaric acid B (PAB), a natural diterpene acid present in the traditional Chinese medicinal herb Tu-Jin-Pi, exerted anticancer effects on various cancer cells. However, the effect of PAB on DU145 cells, an in vitro model of hormone-refractory prostate cancer (HRPC)...
Xia Mai et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 37(22), 3467-3471 (2013-02-05)
To study the effect of pseudolaric acid B (PLAB) on cell proliferation and cycle of human prostate carcinoma DU-145 cells. method: Its inhibitory effect on the cell growth was measured by MTT method. Characteristics of cell death were determined by...
Jing-hua Yu et al.
Acta pharmacologica Sinica, 29(9), 1069-1076 (2008-08-23)
To investigate the apoptotic mechanism of pseudolaric acid B (PAB) in human breast cancer MCF-7 cells. 3-(4,5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide analysis and morphological changes were applied to detect apoptosis. The percentage of apoptotic and necrotic cells were calculated by the lactate...

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