ANTHRAQUINONE, ANTHRONE AND PHENYLPYRONE COMPONENTS OF ALOE NYERIENSIS VAR. KEDONGENSIS LEAF EXUDATE

Article abstract of DOI:10.1016/S0031-9422(00)84578-1

Key Word Index-Aloe nyeriensis var kedongensis; Liliaceae; leaf exudate; anthraquinones; nataloe-emodin; 2-O-β-D-glucopyranosylnataloe-emodin; anthrones; nataloin; 6-phenyl-4-methoxypyran-2-ones; aloenin; aloenin-2''-p-coumaroyl ester; aloenin aglycone; chemotaxonomy. The leaf exudate of Aloe nyeriensis var. kedongensis yielded six compounds which were identified on the basis of spectral data and inter-conversions as two groups of three allied compounds.These were (a) 4-methoxy-6-(2',4'-dihydroxy-6'-methylphenyl)-pyran-2-one, its 2'-O-β-D-glucopyranoside (aloenin) and the 2''-O-p-coumaroyl ester of aloenin, (b) the anthracene derivatives 1,2,8-trihydroxy-6-methylanthraquinone (nataloe-emodin), its 2-O-β-D-glucopyranosyl ester and the corresponding 10-C-β-D-glucopyranoside nataloin.