You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2S)-2-[6-(2-methylimidazol-1-yl)pyridin-2-yl]pyrrolidin-1-yl]-3-phenylpropan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H24N4O
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