You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-[2-[4-(2-formylphosphanyl-1H-imidazol-5-yl)phenyl]azulen-6-yl]-1H-pyrrol-2-yl]phosphanylformaldehyde The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H19N3O2P2
assistant