Chemical and Chemotaxonomical Studies on Filices. XLII. Chemical Studies on the Constituents of Dicranopteris dichotoma (THUNB.) BERNH. and Microlepia obtusiloba HAYATA

Abstract

From the fronds of Dicranopteris dichotoma (THUMB.) BERNH. protocathechuic acid, shikimic acid and two unknown glycosides, which were shown to be p-β-rutinosyloxystyrene (I) and 1-(1-hydroxyethyl)-4-β-rutinosyloxybenzene (II) mainly by spectroscopic methods, were isolated besides the already detected flavonoids (afzelin and quercitrin). The yield of shikimic acid referred to the dry fronds amounted to 3%. From the fronds of Microlepia obtusiloba HAYATA an unknown glycoside was isolated and identified as p-β-D-allosyloxystyrene (III) by spectroscopic methods.