You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-2-(2-methylsulfanylethyl)-3-[2-(2-propan-2-yl-1,3-thiazol-4-yl)ethyl]guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H26N4S2
assistant