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system
Name the molecular formula for the molecule established as [(2R,3S,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-2-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]oxolan-3-yl] [(2R,3S,5R)-5-(6-benzamidopurin-9-yl)-3-[[(2R,3S,5R)-3-dihydroxyphosphanyloxy-5-[2-(2-methylpropanoylamino)-6-oxo-1H-purin-9-yl]oxolan-2-yl]methoxy-hydroxyphosphanyl]oxyoxolan-2-yl]methyl hydrogen phosphite using the IUPAC nomenclature.
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C68H70N13O20P3
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