You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-[3-(aminomethyl)-5-(trifluoromethyl)phenyl]imidazo[1,2-a]pyrazin-8-yl]pyrrolidin-3-ol is the IUPAC name of a molecule. Please give its molecular formula.
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C18H18F3N5O
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