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Two new butanolides, licunolides A (1) and B (2), were isolated from the roots of Litsea acuminata, together with three known compounds: isolancifolide (3), longifolin (4), and sesquirose furan (5). The structures of compounds 1 and 2 were determined by spectroscopic studies (IR, MS, 1D and 2D NMR) and chemical evidence. This is the first report of 4-hydroxy-5-methylbutanolides with a C 10 ...
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