You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4S,5S)-9-[2-(4-methylphenyl)acetyl]-2-(oxan-4-ylmethyl)-4-phenyl-6-oxa-2,9-diazaspiro[4.5]decan-1-one into its molecular formula.
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C28H34N2O4
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