Montelukast Impurities

• Montelukast - Ep Impurity F (Methyl Ketone Impurity)
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• Impurity: Montelukast - Ep Impurity F (Methyl Ketone Impurity)
• Chemical Name: 2-(1-((((S)-3-(2-acetylphenyl)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)propyl)sulfanyl)methyl)cyclopropyl)acetic acid

• Montelukast - EP Impurity C
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• Impurity: Montelukast - EP Impurity C
• Chemical Name: 2-(1-(((S)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propylsulfinyl)methyl)cyclopropyl) acetic acid(Montelukast Sulfoxide impurity)

• Montelukast - EP Impurity B
• 
• Impurity: Montelukast - EP Impurity B
• Chemical Name: 2-(1-(((S)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(prop-1-en-2-yl)phenyl)propylthio)methyl)cyclopropyl)acetic acid(Montelukast Styrene impurity)

• Montelukast - EP Impurity G (Cis isomer)
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• Impurity: Montelukast - EP Impurity G (Cis isomer)
• Chemical Name: 2-(1-((((R)-1-(3-((Z)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfanyl)methyl)cyclopropyl)acetic acid

• Montelukast - EP Impurity
• 
• Impurity: Montelukast - EP Impurity B
• Chemical Name: 1-[[[(IR)-1-[3-[(IE)-2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropane acetamide (Montelukast amide impurity)

• Montelukast - EP Impurity
• 
• Impurity: Montelukast - EP Impurity B
• Chemical Name: 2-(1-((((R) -1-(3-(2-(7-Chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)Sulfonyl)methyl)cyclopropyl)acetic acid

• Montelukast - EP Impurity
• 
• Impurity: Montelukast - EP Impurity
• Chemical Name: 2-[2-[3(S)-[3-[2-(7-Chloro-2-quinolinyl)-ethynyl][phenyl]-3-hydroxypropyl]phenyl]-2-propanol

• Montelukast - Dihydro Impurity
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• Impurity: Montelukast - Dihydro Impurity
• Chemical Name: 1-[[[(1R)-1-[3-[2-(7-Chloro-2-quinolinyl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid sodium salt

• Montelukast Impurities
• 
• Impurity: Montelukast Ep Impurity A (Montelukast S-Isomer)
• Chemical Name: 1-[[[(1S)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy