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What is the molecular formula of the compound with this IUPAC name 6-ethyl-10,13-dimethyl-17-(4-methylhexan-2-yl)-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7-diol ?
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C28H49O2+
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