You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (NE)-N-[2-cyano-2-(1-ethylbenzimidazol-2-yl)-1-phenylethylidene]thiophene-2-sulfonamide into molecular formula.
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C22H18N4O2S2
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