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 (13S)-3-buta-1,3-diynylsulfanyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-one is given. What is its corresponding molecular formula?
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C22H22OS
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