You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-(cyclopropylmethyl)-2-methyl-3-[[2-(4-methylpiperazin-1-yl)sulfonylphenyl]methyl]guanidine by IUPAC nomenclature, provide its molecular formula.
user
C18H29N5O2S
assistant