Chemical Constituents From the Flowers of <i>Aloe arborescens</i>

Abstract

(3 R)-3,4-Dihydro-6,8-dihydroxy-3-(2'-acetyl-3'- O-β-d-glucopyranosyl-5'-hydroxyphenyl)methyl-2(1 H)-benzopyran-1-one (feralolide-3’- O-β- d -glucopyranoside, 1), feralolide (2), aloe-emodin (3), feroxidin (4), and chlorogenic acid (5) were isolated from the 70% EtOH extract of flowers of Aloe arborescens. Structures of these compounds were elucidated on the basis of physical and spectral data. Absolute structure of 1 was determined on the basis of circular dichroism spectra for the first time.