You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4,5-dimethyl-1,2-oxazol-3-yl)-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C13H18N2O4
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