You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[3-(trifluoromethyl)phenyl]-1H-indol-5-yl]-4,5-dihydro-1H-pyridazin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H14F3N3O
assistant