p. 1669 - 1695
(2007/10/03)p. 3225 - 3228
(2007/10/03)6-(pivaloyloxymethyl)-9-(tetrahydropyran-2-yl)purine
6-(acetyloxymethyl)-9-(tetrahydropyran-2-yl)purine
6-chloro-9-(tetrahydro-2H-pyran-2-yl)-9H-purine
6-iodo-9-(tetrahydro-2H-pyran-2-yl)-9H-purine
6-(benzoyloxymethyl)-9-(tetrahydropyran-2-yl)purine