Velpatasvir Impurity 20

Chemical Name: Des (N-(Methoxycarbonyl)-L-Valine) Velpatasvir; methyl ((R)-2-((2S,4S)-4-(methoxymethyl)-2-(5-(2-((2S,5S)-5-methylpyrrolidin-2-yl)-1,11-dihydroisochromeno[4',3':6,7]naphtho[1,2-d]imidazol-9-yl)-1H-imidazol-2-yl)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@@H](C)CC8)=N7)=C6C=C5OC4)C=C3)N2)N(C([C@H](NC(OC)=O)C9=CC=CC=C9)=O)C1