You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[2-[(4R)-6-[2-(4-hydroxyphenyl)ethyl]-7-methyl-2,5-dioxo-3,4-dihydropyrano[3,2-c]pyridin-4-yl]phenoxy]acetic acid into its molecular formula.
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C25H23NO7
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