3PhS-6Ph-2-Pyranone, 6-alkylamide deriv. AIDS-032655 AIDS032655 N-Benzyl-4-{4-hydroxy-5-[(2-isopropylphenyl)thio]-6-oxo-2-phenyl-3,6-dihydro-2H-pyran-2-yl}-N-methylbutanamide