197915-27-8 2H-Pyran-2-one, 3-[[2-(1,1-dimethylethyl)-4-(2-hydroxyethoxy)-5-methylphenyl]thio]-5,6-dihydro-4-hydroxy-6-phenyl-6-(2-phenylethyl)- 4-Hydroxy-5,6-dihydropyrone deriv. AIDS-056978 AIDS056978