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What is the molecular formula of the molecule [(3R,8R,9S,10R,13S,14S)-10,13-dimethyl-17-trimethylsilyloxy-2,3,4,7,8,9,11,12,14,15-decahydro-1H-cyclopenta[a]phenanthren-3-yl] octadecanoate ?
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C40H70O3Si
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