You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[3-(dimethylsulfamoylamino)phenyl]-N-[4-(2-methylpyridin-4-yl)thiophen-2-yl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C20H22N4O3S2
assistant