Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Studies on Constituents of Crude Drugs. XV. New Pyrrolizidine Alkaloids from Ligularia dentata
YOSHIHISA ASADATSUTOMU FURUYA
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1984 Volume 32 Issue 2 Pages 475-482

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Abstract
Four new pyrrolizidine alkaloids, ligularidine, neoligularidine, ligularizine and ligularinine, were isolated together with the known compound clivorine from the roots and aerial parts of Ligularia dentata. Their structures were elucidated on the basis of the spectral data and chemical conversion of clivorine into these alkaloids. A useful epoxidation of pyrrolizidine alkaloids was achieved by using performic acid.
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© The Pharmaceutical Society of Japan
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