英文别名9-[(1S,3R,4S)-2-methylidene-4-phenylmethoxy-3-(phenylmethoxymethyl)cyclopentyl]-6-phenylmethoxypurin-2-amine; 6-(Benzyloxy)-9-[(1S,3R,4S)-2-methylene-4-(phenylmethoxy)-3-[(phenylmethoxy)methyl]cyclopentyl]-9H-purine-2-amine; 6-(Benzyloxy)-9-[(1S,3R,4S)-3,4-bis(benzyloxy)-2-methylenecyclopentyl]-9H-purin-2-amine; 9-[(1S,3R,4S)-2-Methylene-4-(phenylmethoxy)-3-[(phenylmethoxy)methyl]cyclopentyl]-6-(phenylmethoxy)-9H-Purin-2-amine; Entecavir Impurity 68; Entecavir Impurity 128; Entecavir-8; Entecavir Intermediate VIII; 6-(benzyloxy)-9-[(1S,3R,4S)-4-(benzyloxy)-3-(benzyloxymethyl)-2-methylenecyclopentyl]-9H-purin-2-amine