4.6 Article

Daphnane-type diterpenoids from Euphorbia fischeriana Steud and their cytotoxic activities

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FITOTERAPIA
卷 149, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.fitote.2020.104810

关键词

Euphorbia fischeriana Steud; Daphnane-type diterpenoids; Chemical characterization; Cytotoxicity

资金

  1. National Natural Science Foundation of China [81673530, 82073953]
  2. Natural Science Foundation of Qinghai Province [2018-ZJ-907]
  3. Qinghai Provincial Key Laboratory of Phytochemistry for Tibetan Plateau [2017-ZJ-Y19]
  4. Research Teams Project of Guangdong Pearl River Talents Program [2017BT01Y036]

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Two new daphnane-type diterpenoids, fischerianin A and fischerianin B, as well as two known ones, langduin A and langduin A(6), were isolated from Euphorbia fischeriana Steud dry roots. These compounds showed moderate inhibitory activities against various human cancer cell lines, indicating their potential as anticancer agents.
Two new daphnane-type diterpenoids fischerianin A (1) and fischerianin B (2), as well as two known ones langduin A (3) and langduin A(6) (4), were isolated from the extracts of Euphorbia fischeriana Steud dry roots. Their structures including the absolute stereochemistry were determined by various spectroscopic methods and comparing their experimental and calculated CD spectra. 1 and 2 harbor a ketal group and a 9,13-oxide bridge in their C ring which is rare in daphnane-type diterpenoids. In cytotoxic assays, moderately inhibitory activities of 1-4 against human cancer cell lines (human malignant melanoma cell line, A375; human liver carcinoma cell line, HepG2; human promyelocytic leukemia cell line, HL-60; human Caucasian chronic myelogenous leukemia cell line, K562; human cervix epithelioid carcinoma cell line, HeLa) were observed, with IC50 values ranging from 5.31 to 21.46 mu M.

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