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What is the molecular formula of the compound with this IUPAC name O-[(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-2-ethyl-5-(5-oxoimidazo[1,2-a]pyrimidin-8-yl)oxolan-3-yl] imidazole-1-carbothioate ?
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C22H31N5O4SSi
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