You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
furan-2-yl-[4-[(3S,4R)-4-(2-methoxy-4,5-dimethylphenyl)sulfonyl-1,1-dioxothiolan-3-yl]piperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28N2O7S2
assistant