英文别名rel-2-Amino-9-((1R,3S,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-7,9-dihydro-1H-purine-6,8-dione; Entecavir Impurity 17; 2-amino-9-[(1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1,7-dihydropurine-6,8-dione; 8-Hydroxy Entecavir; 2-Amino-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1H-purine-6,8(7H,9H)-dione; Entecavir Impurity J; 8-HYDROXY-9-((1S,3R,4S)-4-HYDROXY-3-(HYDROXYMETHYL)-2-METHYLENECYCLOPENTYL)GUANINE; 2-Amino-8-hydroxy-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one; 2-amino-8-hydroxy-9-((1S,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1H-purin-6(9H)-one 
