You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 3-[2-oxo-2-(pyridin-3-ylmethylamino)-1-(pyridin-4-ylmethylamino)ethyl]benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H24N4O3
assistant