5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-chromen-3-yl 2-O-(3,4-dihydroxy-4-(hydroxymethyl)tetrahydro-2-furanyl)hexopyranoside AIDS-137340 AIDS137340 Kaempferol {3-O-[.beta.-D-apiofuranosyl(1-2)]-.beta.-galacto} pyranoside NSC641260