4-Hydroxy-5,6-dihydropyranone deriv. 5-Cyano-N-[3-[1-(4-hydroxy-2-oxo-6,6-dipropyl)-5,6-dihydro-2H-pyran-3-yl)-2,2-dimethylpropyl]-phenyl]-2-pyridinesulfonamide AIDS-058444 AIDS058444