??? Zolpidem Impurity 18 6-Methyl-2-(4-Methylphenyl)-α-oxo-iMidazo[1,2-a]pyridine-3-acetic Acid Ethyl Ester 2-[4-(Ethoxycarbonyl)phenyl]-6-methyl-imidazo[1,2-a]pyridine-3-acetic Acid 2-[4-(Ethoxycarbonyl)phenyl]-6-methyl-imidazo[1,2-a]pyridine Zolpidem Phenyl-4-carboxylic Acid DIMETHYL-(6-METHYL-2-P-TOLYL-IMIDAZO[1,2-A]PYRIDIN-3-YLMETHYL)-AMINE 6-(Methoxycarbonyl)-2-(4-methylphenyl)imidazo[1,2-a]pyridine-3-acetic Acid, TERT-BUTYL DIAZOACETATE Zolpidem Impurity 64 Zolpidem-d6 Phenyl-4-carboxylic Acid Zolpidem 6-Carboxylic Acid Methyl Ester Zolpidem Phenyl-4-carboxylic Acid Ethyl Ester-d6 4-methyl-N-[3,4,6-trideuterio-5-(trideuteriomethyl)pyridin-2-yl]benzamide Zolpidem-d6 6-Carboxylic Acid Methyl Ester N,N-dimethyl-2-oxo-2-[5,7,8-trideuterio-2-(4-methylphenyl)-6-(trideuteriomethyl)imidazo[1,2-a]pyridin-3-yl]acetamide Zolpidem-d6 6-Carboxylic Acid 6-(Methoxycarbonyl)-2-(4-methylphenyl)imidazo[1,2-a]pyridine