You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-1-(cyclopentylamino)-1-oxopropan-2-yl]-4-(2-methoxy-N-methylsulfonylanilino)-N-[(2-methylphenyl)methyl]butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H39N3O5S
assistant