You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [4-[2-(diethylamino)ethyl]piperazin-1-yl]-[4-methyl-3-(4-methylphenyl)-1-[(4-methylphenyl)methyl]pyrrol-2-yl]methanone into its molecular formula.
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C31H42N4O
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