You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 6-[[4-(2-ethoxyphenyl)piperazin-1-yl]methyl]-4-(4-fluorophenyl)-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H31FN4O4
assistant