for the following products
9-[(2R)-3,5-Bis-O-(4-chlorobenzoyl)-2-deoxy-2-fluoro-2-methyl-beta-D-erythro-pentofuranosyl]-6-chloro-9H-purin-2-amine and (2R,3R,4R,5R)-5-(2-Amino-6-chloro-9H-purin-9-yl)-2-(((4-chlorobenzoyl)oxy)methyl)-4-fluoro-4-methyltetrahydrofuran-3-yl 4-chlorobenzoate