ネジキLyonia ovalifolia DRUDE var.elliptica HAND.-MAZZ.の成分研究(第12報) : Triterpenoid Glycoside, Ovalifoliosideの構造その1

概要

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A new triterpene glycoside, ovalifolioside (I), C_<35>H_<58>O_7,was isolated from the leaves of Lyonia ovalifolia var. elliptica. Acidic hydrolysis of I gave an aglycone, ovalifoliogenin (II), C_<30>H_<50>O_3 and L-arabinose. From the NMR and mass spectral data, II was assumed to be a pentacyclic triterpene derivative, possessing three hydroxyl groups in A and B rings, and no hydroxyl group in D and E rings. II formed an acetonide (IV) with acetone and p-toluenesulfonic acid. IV was oxidised with chromic acid to a ketone (V), which was reduced by the Wolff-Kishner method to an isopropylidene compound (VI), C_<33>H_<54>O_2. VI was identified with the acetonide of 3β, 23-dihydroxyolean-12-ene, which was derived from hederagenin via an unambiguous route.
公益社団法人日本薬学会の論文
1971-02-25