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ID: ALA4425148
Journal: Bioorg Med Chem Lett
Title: Cytotoxic prenylated flavones from the stem and root bark of Daphne giraldii.
Authors: Sun Q, Wang D, Li FF, Yao GD, Li X, Li LZ, Huang XX, Song SJ.
Abstract: Three new prenylated flavones (1-3), along with three known analogues (4-6), were isolated from the stem and root bark of Daphne giraldii. Their structures were determined by comprehensive NMR and HRESIMS spectroscopic data analyses. The absolute configurations of compounds 2 and 3 were assigned by optical rotation comparison, CD and [Rh2(OCOCF3)4]-induced CD spectral methods. The in vitro cytotoxicity experiments carried out involving five cancer cell lines (U251, A549, HepG2, MCF-7 and Bcap37) showed that 2 markedly inhibited the proliferation of all tested cells with IC50 values ranging from 4.26 to 20.82μM. The preliminary structure-activity relationships of these flavones are discussed. In addition, compound 2 was found to effectively induce apoptosis in HepG2 cells according to a flow cytometry analysis.
CiteXplore: 27400887