A pre-anthraquinone derivative from aloe graminicole

Abstract

Atrochrysone and torosachrysone play an important role in the biosynthesis of the common polyketide-derived anthraquinones, such as emodin and physcion [1]. We report here for the first time the occurrence in nature of the pre-anthraquinone 1, named aloegramonol, which can be considered as the precursor of the other common anthraquinone, chrysophanol, Recently, the pre-anthraquinone aloechrysone (2) has been reported to exist in the roots of Aloe berhana [2].