5 research outputs found

    Three new natural cyclopentenedione derivatives from Piper carniconnectivum

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    Three new natural cyclopentenedione derivatives (1-3) and the known coumarin xanthyletin (4) were isolated from the roots of Piper carniconnectivum. The structures were established by spectroscopic data, mainly 1D and 2D NMR and EIMS
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