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, 13 (3), 645-55

Novel Diterpenoids With Potent Inhibitory Activity Against Endothelium Cell HMEC and Cytotoxic Activities From a Well-Known TCM Plant Daphne Genkwa

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Novel Diterpenoids With Potent Inhibitory Activity Against Endothelium Cell HMEC and Cytotoxic Activities From a Well-Known TCM Plant Daphne Genkwa

Zha-Jun Zhan et al. Bioorg Med Chem.

Abstract

Twelve highly oxygenated novel daphnane-type diterpenoids genkwanines A-L (1-12), together with four known diterpenes (13-16), were isolated from the bud of Daphne genkwa, a well-known traditional Chinese medicine (TCM). The new structures were elucidated on the basis of spectral methods, especially 2D NMR spectra (HMQC, HMBC, NOESY). Inhibitory activity against endothelium cell HMEC proliferation and cytotoxic activities against two tumor cell lines were assessed for all the compounds 1-16, and found to be significant and structure related. A number of compounds showed very potent cytotoxic activities against two tumor cell lines at the IC50 levels of 0.15-8.40 microM, and most interestingly, five of the compounds 4, 8, 10, 13, and 14 exhibited strong activity to inhibit the endothelium cell HMEC at the IC50 levels of 2.90-15.0 microM.

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