4-Hydroxy-5,6-dihydropyranone deriv. AIDS-059146 AIDS059146 N-[3-(R or S)-[1-(6,6-Bis(2-phenylethyl)-5,6-dihydro-4-hydroxy-2-oxo-2H-pyran-3-yl)-propyl]-phenyl]-5-cyano-2-pyridinesulfonamide