You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3,4-dimethoxyphenyl)-2-(1,3-dimethyl-2,4-dioxo-6-propan-2-ylpyrido[2,3-d]pyrimidin-5-yl)sulfanylacetamide by IUPAC nomenclature, provide its molecular formula.
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C22H26N4O5S
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