You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[(3R)-3-(1,3-diphenylpyrazol-4-yl)-5-(3-ethylphenyl)-3,4-dihydropyrazol-2-yl]ethanone into its molecular formula.
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C28H26N4O
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