You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-1-[(2-methylphenyl)methyl]-3-[[2-(4-methylpiperazin-1-yl)sulfonylphenyl]methyl]guanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H31N5O2S
assistant