2-(3,4-Dihydroxy-phenyl)-5,7-dihydroxy-3-[2,3,4-trihydroxy-5-(3,4,5-trihydroxy-6-methyl-tetrahydro-pyran-2-yloxymethyl)-tetrahydro-pyran-2-yloxy]-chromen-4-one AIDS-132581 AIDS132581 NSC626808