You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[(8S,13S,14S,17R)-17-ethynyl-13-methylspiro[1,2,4,6,7,8,12,14,15,16-decahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane]-17-yl]ethanone into its molecular formula.
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C24H30O3
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