You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance prop-2-enyl 7-methyl-2,4-dioxo-5-(4-propan-2-ylphenyl)-5,8-dihydro-1H-pyrido[2,3-d]pyrimidine-6-carboxylate .
user
C21H23N3O4
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