Veratrum alkaloids LI. Hypotensive-emeti
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Lawrence C. Weaver; W. Ralph Jones; S. Morris Kupchan
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Article
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1962
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John Wiley and Sons
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English
β 372 KB
protoverine 3-isobutyrate 6,7,16-triacetate 15-nicotinate (XVI) in 57 ml. of methanol was allowed to stand at room temperature for 16 hours. Evaporation to dryness left a resin which resisted attempts a t purification by column chromatography, but which yielded to preparative paper chromatography. T