for the following products
(1S,2S,3S,5S)-5-[2-Amino-6-(phenylmethoxy)-9H-purin-9-yl]-3-(phenylmethoxy)-2-[(phenylmethoxy)methyl]-cyclopentanol | [1S-(1a,2b,3a,5b)]-5-[2-amino-6-(phenylmethoxy)-9H-purin-9-yl]-3-(phenylmethoxy)-2-[(phenylmethoxy)-methyl]-cyclopentanol and (1S,2S,3S,5S)-5-(2-Amino-6-(benzyloxy)-9H-purin-9-yl)-3-(benzyloxy)-2-(benzyloxymethyl)cydopentanol
