You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(3S,10R,13S)-17-methoxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15-decahydro-1H-cyclopenta[a]phenanthren-3-yl] acetate by IUPAC nomenclature, provide its molecular formula.
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C22H32O3
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