You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-[1-(4-methoxyphenyl)-2-methylpropyl]-1,3-dimethyl-2,4-dioxopyrido[2,3-d]pyrimidine-7-carboxamide .
user
C21H24N4O4
assistant