197915-44-9 2H-Pyran-2-one, 3-[[2-(1,1-dimethylethyl)-4-(hydroxymethyl)-5-methylphenyl]thio]-5,6-dihydro-4-hydroxy-6-[2-(4-hydroxyphenyl)ethyl]-6-(4-methoxyphenyl)- 4-Hydroxy-5,6-dihydropyrone deriv. AIDS-056995 AIDS056995