Abstract
Six new dihydrobenzofuran lignans, named illiciumlignans A⿿F (compounds 1⿿6), along with 15 known compounds (7⿿21) were isolated from the branches and leaves of Illicium wardii. The structures of 1⿿6 were determined using a combination of 1D and 2D NMR, HR-ESI⿿-MS, and CD spectroscopic data. Illiciumlignan D (4) is the first reported dihydrobenzofuran lignan arabinofuranoside that is derivatized with the arabinofuranose moiety on C-9⿲. Compounds 1⿿21 were evaluated for cytotoxic activity against four human cancer cell lines. Compounds 8, 12 and 20 exhibited significant activity against human cancer cell lines (A549, SKOV3, HepG2 and HCT116), with IC50 values ranging from 2.7 to 14.9μM.
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