You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-1-[[(1R,2S,3S)-2,3-dimethylcyclohexyl]amino]-1-oxopropan-2-yl] 2-[(3,4-dimethylphenyl)sulfonylamino]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H32N2O5S
assistant