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 1-[(3R,5R,8S,9R,10S,14S)-3-hydroxy-10-methyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-17-yl]ethanone is given. What is its corresponding molecular formula?
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C20H30O2
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