You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[(5-chlorothiophen-2-yl)methyl]piperazin-1-yl]-[1-(1,1-dioxo-1,2-benzothiazol-3-yl)piperidin-4-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25ClN4O3S2
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