You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-[(5-bromo-2-propoxybenzoyl)carbamothioylamino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H23BrN2O4S2
assistant