Three sesquiterpene lactones, tutin (1), coriatin (2), and corianin (3), were isolated from the achenes of Coriaria sinica Maxim, and corianin (3) being for the first time obtained.Moreover, three new derivatives (1a-c) were prepared by acylation at the 2-position of tutin (1).Structures of these compounds were identified and characterized by spectroscopic and X-ray crystallographic analysis.Tutin and acylated analogs thereof showed antifeedant activity against Mythimna separata, and the most potent was 2-iso-butenoyltutin (1b).
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Gao et al. (2007) studied this question.
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