4-Hydroxy-2-pyranone, imidazolylsulfonamide deriv. AIDS-033633 AIDS033633 N-(3-[-Cyclopropyl-[6-[1-(S)-ethylphenethyl)-4-hydroxy-2-oxo-2H-pyran-3-yl)methyl]phenyl)-1-methyl-1H-imidazole-4-sulfonamide