You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3S,5R)-3-hydroxy-5-[2-oxo-4-[(2-phenoxyacetyl)amino]pyrimidin-1-yl]oxolan-2-yl]methyl 2-(2-nitrophenyl)propyl carbonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H28N4O10
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