You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-2-(5-chlorothiophen-2-yl)-N-[1-[2-[2-[(2-methylpyrrolidin-1-yl)methyl]pyrrolidin-1-yl]-2-oxoethyl]-2-oxopiperidin-3-yl]ethenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H33ClN4O4S2
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