2,2-Dimethylpropanoic acid [(2R,3R,5R)-5-[6-(dimethylamino)-9-purinyl]-3-methylsulfonyloxy-2-oxolanyl]methyl ester

ethyl .alpha.-propylacetoacetate ; n-amyl acetoacetate ; ethyl propylacetoacetate ; ethyl 2-propylacetoacetate ; ethyl 2-ethanoylpentanoate ; ethyl 2-acetylvalerate ; ethyl alpha-propylacetoacetate ; ethyl 2-n-propylacetoacetate ; ethyl 2-acetylpentanoate ; 2-acetylvaleric acid ethyl ester