You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [2-[3-(benzhydrylcarbamoyl)-1,2,3,4-tetrahydrocarbazol-9-yl]acetyl] 2-[6-cyano-3-[methyl(phenyl)carbamoyl]-1,2,3,4-tetrahydrocarbazol-9-yl]acetate by IUPAC nomenclature, provide its molecular formula.
user
C51H45N5O5
assistant