4-Hydroxy-5,6-dihydropyranone deriv. 5-Amino-N-[3-(R or S)-[1-(4-hydroxy-2-oxo-6,6-dipropyl-5,6-dihydro-2H-pyran-3-yl)-2,2-dimethylpropyl]-phenyl]-2-pyridinesulfonamide AIDS-059143 AIDS059143