Montelukast EP Impurity D

Chemical Name: 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(carboxymethyl)cyclopropyl]methyl]sulfanyl]-2-(7-chloroquinolin-2-yl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per EP); 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(Carboxymethyl)cyclopropyl]methyl]sulfanyl]-2-(7-chloroquinolin-2-yl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per USP)

Smile: CC(C1=CC=CC=C1CC[C@@H](SCC2(CC2)CC(O)=O)C3=CC=CC([C@H](SCC4(CC4)CC(O)=O)CC5=NC6=CC(Cl)=CC=C6C=C5)=C3)(C)O