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rhazinilam/kopsia
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4 results
Rhazinilam and quebrachamine derivatives from Yunnan Kopsia arborea.
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Three new rhazinilam-derived alkaloids, kopsiyunnanines C1, C2, and C3, and a new quebrachamine-type alkaloid, kopsiyunnanine D, which possess an unusual methoxymethyl or ethoxymethyl function, were isolated from the aerial parts of Yunnan Kopsia arborea. This is the first report of the presence of
Biologically active aspidofractinine, rhazinilam, akuammiline, and vincorine alkaloids from Kopsia.
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Eleven new indole alkaloids, in addition to the previously reported rhazinal (1), and 14 other known alkaloids, were obtained from the Malayan Kopsia singapurensis, viz., kopsiloscines A-F (2-7), 16-epikopsinine (8), kopsilongine- N-oxide (9), 16-epiakuammiline (10), aspidophylline A (11), and
Monoterpenoid Indole Alkaloids from Kopsia officinalis and the Immunosuppressive Activity of Rhazinilam.
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Six new monoterpenoid indole alkaloids, kopsinidines C-E (1-3), 11,12-methylenedioxychanofruticosinic acid (4), 12-methoxychanofruticosinic acid (5), and N(4)-methylkopsininate (7), as well as chanofruticosinic acid (6, as a natural product) and 23 known alkaloids, were obtained from the twigs and
Looking for new drugs: what criteria?
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How to look for new drugs? What guidelines to use? Have we to continue investigations on plant and marine organisms? These questions arise frequently today. A pharmacological effect results from the addition of many effects at a molecular level, i.e. the interaction between a ligand and a receptor.
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