Zolpidem STD-N,N,6-Trimethyl-2-(4-methylphenyl)-imidazo[1,2-a]pyridine-3-acetamide:
Zolpidem-IMP-A N,N-Dimethyl-2-[7-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]acetamide:
Zolpidem IMP-B 2-[2-(3-Bromo-4-methylphenyl)-7-methylimidazo[1,2-a]pyridin-3-yl]-N,N-dimethylacetamide