Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
Tannins and Related Compounds. XCV. : Isolation and Characterization of Helioscopinins and Helioscopins, Four New Hydrolyzable Tannins from Euphorbia helioscopia L. (1)
Seung-Ho LEETakashi TANAKAGen-ichiro NONAKAItsuo NISHIOKA
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Volume 38 (1990) Issue 6 Pages 1518-1523

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Abstract

A chemical examination of polyphenols in Euphorbia helioscopia L. (Euphorbiaceae) has led to the isolation of four new hydrozable tannins named helioscopinins A (10) and B (9), and helioscopins A (11) and B (12), together with eight known tannins (1-8). On the basis of chemical and spectroscopic evidence, the structures of compounds 9-12 were established as 1, 6-(S)-hexahydroxydiphenoyl-3-O-galloyl-β-D-glucose, 1, 6-(S)-hexahydroxydiphenoyl-2, 4-(S)-dehydrohexahydroxydiphenoyl-3-O-galloyl-β-D-glucose, 1, 6-(S)-hexahydroxydiphenoyl-2, 4-(R)-elaeocarpusionoyl-3-O-galloyl-β-D-glucose and 1, 3, 6-tri-O-galloyl-2, 4-(R)-elaeocarpusinoyl-β-D-glucose, respectively.

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