Entecavir USP Impurity C

Chemical Name: 2-amino-9-((1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one

Synonym: metacycline ; (4S,4aR,5S,5aR,12aS)-4-(Dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methylene-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide hydrochloride

Smile: O=C1NC(N)=NC2=C1N=CN2[C@@H]3C([C@@H](CO)[C@@H](O)C3)=C