Extractives of Australian Timbers. XIV. Triterpene Glycosides of Acacia myrtifolia

Abstract

Extraction of Acacia myrtifolia has yielded quercitrin and three triterpene glycosides, named myrtifoliosides A, B, and C. Myrtifolioside A, a minor crystalline component, gave erythrodiol and L-arabinose and D-glucose on hydrolysis. Myrtifolioside B (7), C₄₈H₈₀O₁₇,H₂O, the major crystalline glycoside, formed erythrodiol, D- glucose, and D-galactose on hydrolysis. Hydrolysis of the methyl ester of the amorphous myrtifolioside C gave methyl oleanolate, D-glucose, and D-galactose. The three glycosides were readily separated on silica gel by elution with a solvent containing sodium acetate.