You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (4R)-6-[(2R)-butan-2-yl]-4-(2,4-dimethylphenyl)-1-methyl-4,7-dihydro-3H-pyrrolo[3,4-d]pyrimidine-2,5-dione is given. What is its corresponding molecular formula?
user
C19H25N3O2
assistant