Montelukast EP Impurity G; Montelukast USP RC B; Montelukast cis Isomer

Montelukast EP Impurity G; Montelukast USP RC B; Montelukast cis Isomer

[1-[[[(1R)-1-[3-[(Z)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(2-hydroxypropan-2-yl) phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid

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