R&D Systems Inc. Tocris Bioscience Boston Biochem


Cat. No. 1293

b-Lapachone C15H14O3 [4707-32-8]

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Chemical Name: 3,4-Dihydro-2,2-dimethyl-2H-naphtho[1,2-b]pyran-5,6-dione

Biological Activity

DNA topoisomerase I inhibitor. Exhibits a different inhibitory mechanism to camptothecin (Cat. No. 1100). Induces apoptosis in a variety of cell lines, including prostate cancer and promyelocytic leukemia cells; blocks the cell cycle in G0/G1. Also has effects on DNA topoisomerase II, NF-κB, AP-1, and JNK.

Technical Data

Soluble to 100 mM in DMSO and to 50 mM in ethanol
>98 %
Store at +4°C

The technical data provided above is for guidance only.
For batch specific data refer to the Certificate of Analysis.

Certificate of Analysis / Safety Data Sheet

Certificate of Analysis: View current batch
Safety Data Sheet: View Safety Data Sheet


Li et al (1993) Beta-Lapachone, a novel topoisomerase I inhibitor with a mode of action different from camptothecin. J.Biol.Chem. 268 22463. PMID: 8226754.

Wuerzberger et al (1998) Induction of apoptosis in MCF-7:WS8 breast cancer cells by β-Lapachone. Cancer Res. 58 1876. PMID: 9581828.

Manna et al (1999) Suppression of tumor necrosis factor-activated nuclear transcription factor-κB, activator protein-1, c-Jun N-terminal kinase, and apoptosis by β lapachone. Biochem.Pharmacol. 57 763. PMID: 10075082.

Shiah et al (1999) Activation of c-Jun NH2-terminal kinase and subsequent CPP32/Yama during topoisomerase inhibitor β-lapachone-induced apoptosis through an oxidation-dependent pathway Cancer Res. 59 391. PMID: 9927052.

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Keywords: b-Lapachone, supplier, DNA, topoisomerase, I, inhibitors, apoptosis, proapoptotic, b-lapachone, beta-lapachone, β-lapachone

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