AIDS-153303 AIDS153303 NSC699771 Spiro[5H-1,3-dioxolo[4,5-g][2]benzopyran-8(7H),4'-[4H-1,2]oxazin]-5'-ol, 6'-[(2,2-diphenylcyclopentyl)oxy]-5',6'-dihydro-, acetate (ester), 2'-oxide