You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (6R,9S)-9-methyl-11-(morpholin-4-ylmethyl)-6-phenyl-6,8,9,10-tetrahydrobenzo[c][1,5]benzothiazepin-7-one is given. What is its corresponding molecular formula?
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C25H28N2O2S
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