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Two novel diterpenoids were isolated from a diethylether extract of the leaves of Isodon glutinosus. Their structures were elucidated by 1D and 2D NMR experiments, including, 1 H- 1 H correlation spectroscopy (COSY, NOESY) and 1 H- 13 C heteronuclear correlation (COSY, COLOC).
Investigation of the roots of Taxus yunnanensis led to the isolation of two groups of interconvertible taxanes, made up by two and three compounds, respectively. Three of the compounds are new and were identified as 1 β-hydroxy-10-deacetyl-baccatin I, 10-deacetyl-baccatin VI and 9-deacetyl-baccatin VI.
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