You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R,3R)-N-[8-amino-6-(2-methylphenyl)-2,7-naphthyridin-3-yl]-5-methylsulfonyl-5-azaspiro[2.4]heptane-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C23H25N5O3S
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