英文别名Entecavir Impurity 37; Entecavir Impurity 35; Entecavir Impurity 6; 2-amino-9-[(1R,3S,4R)-2-methylidene-4-phenylmethoxy-3-(phenylmethoxymethyl)cyclopentyl]-1H-purin-6-one; 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(1R,3S,4R)-2-methylene-4-(phenylmethoxy)-3-[(phenylmethoxy)methyl]cyclopentyl]- 
