3 CHROMONES OF ALOE-VERA LEAVES

Three new chromone components were isolated from the gel of Aloe leaf. The structures of these compounds, which we have named 8-C-glucosyl-( S)-aloesol, 8-C-glucosyl-7-O-methylaloediol and isorabaichromone, were shown to be 2-[(S)-2-hydroxy]propyl-7-hydroxy-5-methylchromone (8-C-g lucosyl-(S)-aloesol), 1',2'-dihydroxylpropyl)-7-methoxy-5-methylchromo ne (8-C-glucosyl-7-O-methylaloediol) and caffeoyl]glucopyranosyl-2-[(S )-2-hydroxy]propyl-7- methoxy-5-methylchromone, respectively (isorabai chromone), by spectroscopic methods. (C) 1997 Elsevier Science Ltd. Al l rights reserved.