On the Constituents of the Roots of Angelica japonica A. GRAY. (2)

1 January 1965

journal article
Published by Pharmaceutical Society of Japan in YAKUGAKU ZASSHI

Vol. 85 (1) , 55-61
https://doi.org/10.1248/yakushi1947.85.1_55

Abstract

Hamaudol, C₁₅H₁₆O₅, a constituent of the roots of Angelica japonica, has been shown to be a derivative of 2-methyl-5-hydroxychromone. On treating with p-toluenesulfonic acid, hamaudol gave two isomeric dehydration products, C₁₅H₁₄O₄, one of which was identical with the anhydrovisamminol obtained by Schmid from visamminol, being an isomer however, it may not be identical with hamaudel. These findings suggested two possible structures, Ia and Ib, and the formula (Ib) was confirmed in a complete agrrement with hamaudol by its nuclear magnetic resonance spectrum.

Keywords

CHEMISTRY, ANALYTICAL
CHROMONES
EXPERIMENTAL LAB STUDY
PLANTS

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