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What is the molecular formula of the molecule (2S,4aR,6aR,11aS,11bS)-9-[tert-butyl(dimethyl)silyl]oxy-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-10,11b-dimethyl-1,2,4a,6a,11,11a-hexahydroindeno[2,1-f]isochromen-4-one ?
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C31H50O4Si2
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