You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 8-(2,5-dimethylfuran-3-carbonyl)-3-[2-[2-methoxyethyl(methyl)amino]ethyl]-1-oxa-3,8-diazaspiro[4.5]decan-2-one by IUPAC nomenclature, provide its molecular formula.
user
C20H31N3O5
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