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system
Name the molecular formula for the molecule established as [[(2R)-4-(2-amino-4-oxo-4a,5-dihydro-3H-pteridin-6-yl)-2-hydroxy-3,4-bis(sulfanyl)butoxy]-hydroxyphosphoryl] [(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl hydrogen phosphate using the IUPAC nomenclature.
user
C20H28N10O13P2S2
assistant