4-Hydroxy-5,6-dihydropyranone deriv. 5-Cyano-N-[3-1-(6-[3-([(5-cyano-2-pyridinyl)sulfonyl]amino)phenyl]-6-ethyl-5,6-dihydro-4-hydroxy-2-oxo-2H-pyran-3-yl)propyl]-phenyl)-2-pyridinesulfonamide AIDS-058433 AIDS058433