You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-hydroxyethyl)-3-[[(2R)-1-(2-methylpropyl)azepan-2-yl]methyl]-1-benzothiophene-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H32N2O2S
assistant