You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-(6-amino-2,4-dioxo-1H-pyrimidin-5-yl)-6-(2,4-dimethylphenyl)-1,7-dihydropyrrolo[2,3-d]pyrimidine-2,4-dione by IUPAC nomenclature, provide its molecular formula.
user
C18H16N6O4
assistant