You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-(5-amino-5-oxopentyl)-2-ethoxy-1-methyl-9-(3-methylthiophen-2-yl)-3,4-dihydro-2H-carbazole-4-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C26H32N2O4S
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