You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[2-(4,5-dimethyl-1,3-thiazol-2-yl)ethylcarbamoylamino]phenyl]-N-methylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24N4O2S
assistant