You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 1-[4-[(4aS,10bS)-7-ethoxy-5,5-dimethylspiro[2,4,4a,10b-tetrahydropyrano[3,2-c]chromene-3,4'-piperidine]-1'-yl]-4-oxobutyl]pyrrolidine-2,5-dione is given. What is its corresponding molecular formula?
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C28H38N2O6
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