Velpatasvir Impurity 21

Chemical Name: methyl ((R)-2-((2S,4S)-2-(9-(2-((2S,4S)-1-((R)-2-((methoxycarbonyl)amino)-2-phenylacetyl)-4-(methoxymethyl)pyrrolidin-2-yl)-1H-imidazol-5-yl)-1,11-dihydroisochromeno[4',3':6,7]naphtho[1,2-d]imidazol-2-yl)-4-(methoxymethyl)pyrrolidin-1-yl)-2-oxo-1-phenylethyl)carbamate

Smile: COC[C@H]1C[C@@H](C2=NC=C(C3=CC4=C(C5=CC6=CC=C7C(NC([C@H]8N(C([C@H](NC(OC)=O)C9=CC=CC=C9)=O)C[C@@H](COC)C8)=N7)=C6C=C5OC4)C=C3)N2)N(C([C@H](NC(OC)=O)C%10=CC=CC=C%10)=O)C1