You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-ethyl-3-[2-(4-ethyl-5-methyl-1,3-thiazol-2-yl)ethyl]-2-(thiophen-3-ylmethyl)guanidine into its molecular formula.
user
C16H24N4S2
assistant