You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(2,5-dimethylanilino)-2-oxo-1-phenylethyl] 1-(phenylcarbamoyl)piperidine-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H31N3O4
assistant