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What is the molecular formula of the molecule 1-[(1S,3R,4R,7S)-7-[tert-butyl(dimethyl)silyl]oxy-1-propan-2-yl-2,5-dioxabicyclo[2.2.1]heptan-3-yl]pyrimidine-2,4-dione ?
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C18H30N2O5Si
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