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 ethyl 4-[2-(9,9-dimethyl-7-oxo-6-thiophen-2-yl-6,8,10,11-tetrahydrobenzo[b][1,4]benzodiazepin-5-yl)acetyl]piperazine-1-carboxylate into molecular formula.
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C28H34N4O4S
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