英文别名2-Amino-9-((3aS)-3a,6-dihydroxyhexahydro-1H-cyclopenta[c]furan-4-yl)-1,9-dihydro-6H-purin-6-one; Furoentecavir; Entecavir Impurity; Entecavir Impurity I; Entecavir USP Impurity A; Entecavir EP Impurity; 2-Hydroxy-2,3-tetrahydrofuranyl Entecavir; 9-[(3aS,4S,6S,6aR)-3a,6-dihydroxy-1,3,4,5,6,6a-hexahydrocyclopenta[c]furan-4-yl]-2-amino-1H-purin-6-one 
