You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1S)-1-(2,5-dimethylphenyl)ethyl]-2-(N-methylsulfonyl-4-propan-2-ylanilino)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H30N2O3S
assistant