You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[4-(2-fluorophenyl)piperazin-1-yl]-N-(2-methoxy-5-methylphenyl)-6-oxo-4,5-dihydro-1H-pyrimidine-4-carboxamide .
user
C23H26FN5O3
assistant