You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[5-(1,3-benzothiazol-2-yl)furan-2-yl]-[4-(2-hydroxy-5-methylphenyl)sulfonylpiperazin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H21N3O5S2
assistant