Chemical and Chemotaxonomical Studies of Filices. LXVI. : Chemical Studies on the Constituents of Pseudocyclosorus subochthodes CHING and P. esquirolii CHING (Organic)

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Abstract
From the fronds of Pseudocyclosorus subochthodes CHING and P. esquirolii CHING, a new flavonone glycoside (2S)-eriodictyol 7-O-methylether 3''-O-.beta.-D-glucopyranoside (I) and maltol 3-O-.beta.-D-glucopyranoside (V) were isolated. Besides them, from the former a new glycoside 5-hydroxymaltol 5-O-.alpha.-L-rhamnopyranoside (II) and (2E, 6E)-(10S)-2,6,10-trimethyl-2,6,11-dodecatriene-1,10-diol(12-hydroxynerolidol) (III) were isolated and from the latter astragalin and shikimic acid were isolated. Their structures were elucidated by the chemical and spectroscopic methods.

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