You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-methyl-6-oxo-N-[(4-oxo-3H-quinazolin-2-yl)methyl]-1-(2-phenoxyethyl)pyridazine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H21N5O4
assistant