4-Hydroxy-5,6-dihydropyranone deriv. AIDS-059147 AIDS059147 N-[3-(R or S)-[1-(4-Hydroxy-2-oxo-6,6-diphenylethyl-5,6-dihydro-2H-pyran-3-yl)-propyl]-phenyl]-1-methyl-1H-imidazole-4-sulfonamide