You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named furan-2-ylmethyl-[2-(2-methoxy-5-piperidin-1-ylsulfonylanilino)-2-oxoethyl]azanium by IUPAC nomenclature, provide its molecular formula.
user
C19H26N3O5S+
assistant