3(Imid-SO2NHBz)-4OH-2Pyranone deriv. AIDS-049982 AIDS049982 N-(3-[[S or R]-Cyclopropyl[4-hydroxy-2-oxo-6-[1(R)-phenylmethyl)propyl]-2H-pyran-3-yl)methyl]phenyl])-1-methyl-1H-imdazole-2-sulfonamide