You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-methyl-1-[[4-[(2-methylpiperidin-1-yl)methyl]phenyl]methyl]-3-[(5-methyl-1,3-thiazol-2-yl)methyl]guanidine into molecular formula.
user
C21H31N5S
assistant