Lifitegrast Impurity 6

Chemical Name: (S)-2-(2-(benzofuran-6-carbonyl)-5,7-dichloro-1-oxo-1,2,3,4-tetrahydroisoquinoline-6-carboxamido)-3-(3-(methylsulphonyl)phenyl)propanoic acid

Smile: O=C(O)[C@@H](NC(C1=C(Cl)C2=C(C(N(C(C3=CC=C4C=COC4=C3)=O)CC2)=O)C=C1Cl)=O)CC5=CC=CC(S(=O)(C)=O)=C5