You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[5-bromo-3-ethyl-7-(trifluoromethyl)pyrazolo[1,5-a]pyridine-2-carbonyl]piperazin-2-one .
user
C15H14BrF3N4O2
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