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Three new lignans, melodinins A–C (1–3), together with four known analogues (4–7), were isolated from the stems of Melodinus suaveolens. Their structures including relative configurations were determined by spectroscopic methods, including 1D and 2D NMR, and HRESIMS. Their absolute configurations were unambiguously assigned by electronic circular dichroism (ECD) experiments, especially the application...
Two new monoterpenoid indole alkaloids, melaxillines A (1) and B (2), together with four known alkaloids (3–6), were isolated from the roots of Melodinus axillaris. The structures were determined by extensive spectroscopic methods, including 1D and 2D-NMR spectroscopy, high resolution mass spectrometric data, and by comparison to literature data. New compounds 1–2 might be derived from a common precursor...
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