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What is the molecular formula of the compound with this IUPAC name tert-butyl-[[(8S,9S,13S,14S,17Z)-17-ethylidene-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl]oxy]-dimethylsilane ?
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C26H40OSi
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