You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(E)-4-amino-3-cyano-2-oxopent-3-enyl] 2-[(E)-4-amino-3-cyano-2-oxopent-3-enyl]sulfanylbenzoate by IUPAC nomenclature, provide its molecular formula.
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C19H18N4O4S
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