(2R,3R)-2-(3,4-Dihydroxyphenyl)-3,5-dihydroxy-4-oxo-3,4-dihydro-2H-chromen-7-yl 2-deoxy-a-D-arabino-hexopyranoside AIDS-058988 AIDS058988 Taxifolin-7-O-.beta-D-glucopyranoside