You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(1R)-2,2,2-trichloro-1-(2-methylpropanoylamino)ethyl]carbamothioylamino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H21Cl3N4O2S2
assistant