You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 6-chloro-N-(2-chloro-4-nitrophenyl)-3-[(4-nitrophenyl)methylidene]-2,2,2-triphenyl-4H-1,2lambda5-benzoxaphosphinine-8-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C40H28Cl2N3O6P
assistant