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system
Provide the molecular formula for the IUPAC named substance [(6R,7S)-3-hydroxy-8-oxo-7-[(4S)-2-oxo-4-phenyl-1,3-oxazolidin-3-yl]-1-azabicyclo[4.2.0]oct-2-en-2-yl] methyl carbonate .
user
C18H18N2O7
assistant