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 3-[4-[2-(2-chloro-4-methoxyphenyl)-1-(1H-indazol-5-yl)but-1-enyl]phenyl]prop-2-enoic acid is given. What is its corresponding molecular formula?
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C27H23ClN2O3
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