You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-hydroxy-2-oxoazepan-1-yl)-N-[(7-methylimidazo[1,2-a]pyridin-2-yl)methyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H22N4O3
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