Montelukast EP Impurity C; Montelukast USP RC A; Montelukast Sulfoxide ; Montelukast S-Oxide

Montelukast EP Impurity C; Montelukast USP RC A; Montelukast Sulfoxide ; Montelukast S-Oxide

[1-[[[1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(2-hydrox-ypropan-2-yl)phenyl]propyl]sulfinyl]methyl]cyclopropyl]acetic acid

Impurity reference standard used for related substances testing of Montelukast Acid drug substance and drug product per pharmacopoeial limits.