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system
Please write the molecular formula of the molecule [(2R,3R,4R,5R)-2-[[[(2R,3R,4R,5R)-4-[tert-butyl(dimethyl)silyl]oxy-2-[[(4-methoxyphenyl)-diphenylmethoxy]methyl]-5-[6-(prop-2-enoxycarbonylamino)purin-9-yl]oxolan-3-yl]oxy-prop-2-enoxyphosphanyl]oxymethyl]-5-[6-(prop-2-enoxycarbonylamino)purin-9-yl]-4-prop-2-enoxycarbonyloxyoxolan-3-yl] prop-2-enyl carbonate .
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C65H75N10O18PSi
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