You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[[2-(2,6-dimethylanilino)-1-(3,5-dimethylphenyl)-2-oxoethyl]-ethylamino]-3-methyl-1-oxopentan-2-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H45N3O4
assistant