You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1S)-1-(1-benzofuran-2-yl)ethyl]-3-[2-(1,3-thiazol-4-yl)ethyl]urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H17N3O2S
assistant