You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-ethyl-3-[(3-methyl-4-methylsulfonylphenyl)methyl]-2-[[3-(2-methylpropoxy)phenyl]methyl]guanidine by IUPAC nomenclature, provide its molecular formula.
user
C23H33N3O3S
assistant