You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (6'-hydroxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-3'-yl) 1H-diazete-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C23H14N2O6
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