You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R,3S,5S)-1-(furan-2-carbonyl)-2-(furan-2-yl)-10-(2-methoxyethyl)-11-oxo-1,10-diazaspiro[4.6]undecane-3-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
user
C22H26N2O7
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