You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(4-methoxyphenyl)-1,3-dimethyl-6-[2-(methylamino)-5-nitrophenyl]pyrrolo[3,4-d]pyrimidine-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21N5O5
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