You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (E)-3-[3-[(4-methanimidoyl-3-methyl-1-oxopyrido[1,2-a]benzimidazol-10-ium-2-yl)methylideneamino]phenyl]prop-2-enoate into molecular formula.
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C23H16N4O3
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