You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-ethoxy-3-(2-methylindazol-5-yl)-1-[4-(trifluoromethoxy)phenyl]-1,8-naphthyridin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H19F3N4O3
assistant