You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule sodium;(5R,6S)-6-[(1R)-1-hydroxyethyl]-3-(6-methoxycarbonyl-9-oxofluoren-3-yl)-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate into molecular formula.
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C24H18NNaO7
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