You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [2-[1-(2-benzamidoethanimidoyl)-6-iminopyridin-3-yl]-5-fluorophenyl] methanesulfinate is given. What is its corresponding molecular formula?
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C21H19FN4O3S
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