6-chloroentecavir

tert-butyl (6-iodo-9-((4aR,6S,7aS)-2-methyl-5-methylenehexahydrocyclopenta[d][1,3]dioxin-6-yl)-9H-purin-2-yl)carbamate

6-(benzyloxy)-9-((4aR,6S,7aS)-5-methylene-2-phenylhexahydrocyclopenta[d][1,3]dioxin-6-yl)-N-(trimethylsilyl)-9H-purin-2-amine

9-[(1S,3R,4S)-4-tert-butyldimethylsilyloxy-3-(tert-butyldimethylsilyloxymethyl)-2-methylene-cyclopentyl]-6-chloro-9H-purine-2-carbamic acid tert-butyl ester