2H-1,4,5-Trioxa-4a-azacyclopent[cd]indene-3-carboxylic acid, 6-[(2,2-diphenylcyclopentyl)oxy]hexahydro-2-oxo-, 1,1-dimethylethyl ester, (3R,6S,7aR)- AIDS-089201 AIDS089201 NSC699789