3-((2,6-Dideoxy-4-O-(2,6-dideoxy-4-O-(2,6-dideoxy-4-O-(2,6-dideoxy-3-O-methylhexopyranosyl)-3-O-methylhexopyranosyl)-3-O-methylhexopyranosyl)-3-O-methylhexopyranosyl)oxy)-8,14,17-trihydroxy-20-oxopreg\tn-5-en-12-yl 3,4-dimethyl-2-pentenoate AIDS-149567 AIDS149567 NSC684429