You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(5,6,7,8-tetrahydroimidazo[1,2-a]pyridin-2-yl)ethyl]pyrrolidine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H22N4O
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