Entecavir USP Impurity A

Chemical Name: 9-[(3aS ,4S ,6S ,6aR )-3a,6-Dihydroxyhexahydro-1H -cyclopenta[c]furan-4-yl]guanine

Synonym: 4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide ; Dentistar ; Doximal ; Doxymycin ; Tetradox ; α-6-Deoxy-5-hydroxytetracycline ; α-Doxycycline

Smile: NC(N1)=NC(N([C@H]2C[C@H](O)[C@@]3([H])COC[C@]32O)C=N4)=C4C1=O