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 2-[4-[2-(2-bromo-4-fluorophenoxy)pyridine-3-carbonyl]piperazin-1-yl]-N-propan-2-ylacetamide .
user
C21H24BrFN4O3
assistant