4-Hydroxy-5,6-dihydropyranone deriv. 5-Amino-N-[3-[1-(4-hydroxy-2-oxo-6-phenethyl-6-n-propyl-5,6-dihydro-2H-pyran-3-yl)-2,2-dimethylpropyl]-phenyl]-2-pyridinesulfonamide AIDS-058450 AIDS058450