1-(8,12-Dihydroxy-3a,6,10-trimethyl-1,2,3,3a,6,7,8,11,12,12a-decahydrocyclopenta[a]cycloundecen-1-yl)-1-methylethyl acetate 18-Acetoxy-6,10-dihydroxy-2,7-dolabelladiene AIDS-131121 AIDS131121 NSC622254