You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-(4-ethoxyphenyl)-N-[3-(6-oxo-1H-pyridazin-3-yl)phenyl]-2-phenylprop-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H23N3O3
assistant