You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[1-[[2-[[(2S)-4-methylpentan-2-yl]amino]-2-oxoethyl]amino]-1-oxo-3-phenylpropan-2-yl]carbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H35N3O4
assistant