197915-41-6 2H-Pyran-2-one, 3-[[2-(1,1-dimethylethyl)-4-hydroxy-5-methylphenyl]thio]-5,6-dihydro-4-hydroxy-6-[4-(2-hydroxyethoxy)phenyl]-6-(2-phenylethyl)- 4-Hydroxy-5,6-dihydropyrone deriv. AIDS-056992 AIDS056992