You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,9-dimethylpurin-6-amine;1,3-dimethylpyrimidine-2,4-dione;9-methyl-2-(methylamino)-1H-purin-6-one;1-methyl-4-(methylamino)pyrimidin-2-one;1,3,5-trimethylpyrimidine-2,4-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H45N17O6
assistant