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Zafirlukast

4-[Bis-(5-amino-1-methyl indol-3-yl) methyl]-3-methoxy benzoic acid methyl ester
Impurity 1

CAS No.                   : NA
Molecular Formula: C28H28N4O3
Molecular Weight   : 468.55
Chemical Name      : 4-[Bis-(5-amino-1-methyl indol-3-yl) methyl]-3-methoxy benzoic acid methyl ester

MAM (Impurity-2)

CAS No.                   : NA
Molecular Formula: C29H30N2O6
Molecular Weight   : 502.56
Chemical Name      : Dimethyl 4,4′-((5-amino-1-methyl-1H-indole-2,3-diyl)bis(methylene))bis(3-methoxybenzoate)

4-[Bis-(5-cyclopentyloxycarbonylamino-l-methyl indol-3-y1)-methyl] – 3-methoxy-benzoic acid.
ZAF2 (Imp-1)

CAS No.                   : NA
Molecular Formula: C39H42N4O7
Molecular Weight   : 678.77
Chemical Name      : 4-[Bis-(5-cyclopentyloxycarbonylamino-l-methyl indol-3-y1)-methyl] – 3-methoxy-benzoic acid.

4-(bis(5-(((cyclopentyloxy)carbonyl)amino)-1-methyl-1H-indol-3-yl)methyl)-3-methoxybenzoic acid methyl ester
ZAF-1-imp-1

CAS No.                   : NA
Molecular Formula: C40H44N4O7
Molecular Weight   : 692.80
Chemical Name      : 4-(bis(5-(((cyclopentyloxy)carbonyl)amino)-1-methyl-1H-indol-3-yl)methyl)-3-methoxybenzoic acid methyl ester

4-(bis(5-(((cyclopentyloxy)carbonyl)amino)-1-methyl-1H-indol-3-yl)methyl)-3-methoxybenzoic acid
ZAF-2 imp-1

CAS No.                   : NA
Molecular Formula: C39H42N4O7
Molecular Weight   : 678.77
Chemical Name      : 4-(bis(5-(((cyclopentyloxy)carbonyl)amino)-1-methyl-1H-indol-3-yl)methyl)-3-methoxybenzoic acid

dicyclopentyl (((2-methoxy-4-((o-tolylsulfonyl)carbamoyl)phenyl)methylene) bis(1methyl-1H-indole-3,5-diyl))dicarbamate
ZAF-3 imp-1

CAS No.                   : 1160235-24-4
Molecular Formula: C46H49N5O8S
Molecular Weight   : 831.97
Chemical Name      : dicyclopentyl (((2-methoxy-4-((o-tolylsulfonyl)carbamoyl)phenyl)methylene) bis(1methyl-1H-indole-3,5-diyl))dicarbamate

4-[[5-Cyclopentyloxy carbonyl amino-2- [(3-methoxy benzoic acid methyl ester-4-yl)-methyl]-1-methyl indol-3-yl] – methyl] – 3-methoxy- benzoic acid methyl ester
ZAF-1 imp-2

CAS No.                   : 1160235-24-4
Molecular Formula: C35H38N2O8
Molecular Weight   : 614.68
Chemical Name      : 4-[[5-Cyclopentyloxy carbonyl amino-2- [(3-methoxy benzoic acid methyl ester-4-yl)-methyl]-1-methyl indol-3-yl] – methyl] – 3-methoxy- benzoic acid methyl ester

4-[[5-Cyclopentyloxy carbonyl amino-2- [(3-methoxy benzoic acid-4-y1)-methyl]-1-methyl indol-3-yl] – methyl] – 3-methoxy- benzoic acid.
ZAF2 (Imp-2)

CAS No.                   : NA
Molecular Formula: C33H34N2O8
Molecular Weight   : 586.63
Chemical Name      : 4-[[5-Cyclopentyloxy carbonyl amino-2- [(3-methoxy benzoic acid-4-y1)-methyl]-1-methyl indol-3-yl] – methyl] – 3-methoxy- benzoic acid.

Methyl 4-(5-nitro-1-methyl indol-3-yl methyl)-3-methoxy benzoate
ZAF2(IMP-A)

CAS No.                   : NA
Molecular Formula: C19H18N2O5
Molecular Weight   : 354.36
Chemical Name      : Methyl 4-(5-nitro-1-methyl indol-3-yl methyl)-3-methoxy benzoate