英文同义词: | 2-amino-9-((1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one;Entecavir (1S,3S,4S) Diastereomer;Entecavir impurity C;Entecavir Impurity G;Entecavir Impurity 7(Entecavir EP Impurity B);Entecavir impurity 5/(1S,3S,4S)-Entecavir/2-Amino-1,9-dihydro-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-purin-6-one;Entecavir EP Impurity B;2-amino-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1~{H}-purin-6-one |