2,5-Bis(4-methoxyphenyl)-3,6-dioxo-4-((2,3,4-tri-O-acetyl-6-methylhexopyranuronosyl)oxy)-1,4-cyclohexadien-1-yl methyl 2,3,4-tri-O-acetylhexopyranosiduronate AIDS-128533 AIDS128533 NSC285139