Studies on the Constituents of Aloe arborescens MILL. var. natalensis BERGER. I. The Structure of Aloearbonaside, a Glucoside of a New Type naturally Occurring Chromene

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Abstract
A new phenolic glucoside named aloearbonaside was isolated from the leaves of Aloe arborescens MILL. var. natalensis BERGER in addition to barbaloin. The structure of aloearbonaside was established as I, methyl 2-(5-methyl-7-hydroxy-4-0-β-D-glucopyranosy1)-chromenylideneacetate, a glucoside of a new type naturally occurring chromene, on the basis of spectral and chemical evidences.