You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(dimethylamino)ethyl]-2,5-dimethoxy-N-[(5-methylfuran-2-yl)methyl]benzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H26N2O5S
assistant