Montelukast Nitrile Impurity

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetonitrile

Smile: CC(C1=CC=CC=C1CC[C@@H](SCC2(CC2)CC#N)C3=CC=CC(/C=C/C4=NC5=CC(Cl)=CC=C5C=C4)=C3)(C)O