You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-benzyl-N-[2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-2-oxoethyl]-2-ethenyl-N-prop-2-enylbenzamide;yttrium by IUPAC nomenclature, provide its molecular formula.
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C28H31N2O4Y-
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