You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (2S,6R,8R,12S)-1,14-dimethyl-4,10-bis(3-methylphenyl)-3,5,9,11-tetraoxo-4,10-diazatetracyclo[5.5.2.02,6.08,12]tetradec-13-ene-13-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H30N2O6
assistant