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What is the molecular formula of the molecule identified by (10R,13S,17R)-13-ethyl-6-(hydroxymethyl)spiro[1,2,4,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-17,5'-2H-furan]-3-one ?
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C23H32O3
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