You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-1-[2-(3-methylphenyl)propyl]-3-[(2-propan-2-yl-1,3-thiazol-4-yl)methyl]guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H28N4S
assistant