p. 4 - 8
(2007/10/03)9-{(3aR,4R,6R,6aR)-6-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl}-2-chloromethyl-1,9-dihydro-purin-6-one
9-{(3aR,4R,6R,6aR)-6-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl}-2-hydroxymethyl-1,9-dihydro-purin-6-one