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 1-[3-(2-hydroxyethyl)-1,2-dihydroimidazol-4-yl]-2-methyl-4-naphthalen-1-ylpyrrole-3-carboxamide into molecular formula.
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C21H22N4O2
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