恩替卡韦杂质  Entecavir impurity

ETW-A  2-amino-9-((1R,3R,4S)-4-hydroxy-3(hydroxymethyl)-2methylenecyclopentyl)-1,9-dihydro-6Hpurin-6-one  1367369-78-5

ETW-D  2-amino-9-((1S,3R,4R)-4-hydroxy-3(hydroxymethyl)-2methylenecyclopentyl)-1,9-dihydro-6Hpurin-6-one  1367369-80-9

ETW-07  2-amino-9-((1R,3S,4R)-4-hydroxy-3(hydroxymethyl)-2methylenecyclopentyl)-1,9-dihydro-6Hpurin-6-one  188399-46-4

ETW-11  (1R,2S,3S,5R)-5-(2-amino-6(benzyloxy)-9H-purin-9-yl)-3(benzyloxy)-2((benzyloxy)methyl)cyclopentan-1-ol

ETW-12  (1S,2S,3R,4S)-2-(2-amino-6(benzyloxy)-9H-purin-9-yl)-4(benzyloxy)-3((benzyloxy)methyl)cyclopentan-1-ol

ETW-13  2-amino-9-((1S,4S)-3,4-dihydroxy-3methyl-2-methylenecyclopentyl)-8methoxy-1,9-dihydro-6H-purin-6-one

ETW-14  2-amino-9-((3aS,4S,6S,6aR)-3a,6dihydroxyhexahydro-1Hcyclopenta[c]furan-4-yl)-1,9-dihydro-6Hpurin-6-one  1984788-96-6

ETW-15  (1S,2S,3R,5S)-5-(2-amino-6(benzyloxy)-9H-purin-9-yl)-3(benzyloxy)-2((benzyloxy)methyl)cyclopentanol

ETW-16  (1R,2R,3R,4R)-2-(2-amino-6(benzyloxy)9H-purin-9-yl)-4-(benzyloxy)-3((benzyloxy)methyl)cyclopentan-1-ol

ETW-17  (1R,2S,3R,5R)-5(2-amino-6-(benzyloxy)-9H-purin-9-yl) -3-(benzyloxy)-2-((benzyloxy)methyl) cyclopentan-1-ol

ETW-18  (1S,2S,3R,4R)-2-(2-amino6-(benzyloxy)-9H-purin-9-yl) -4-(benzyloxy)-3-((benzyloxy)methyl) cyclopentan-1-ol