You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[4-(2,3-dimethylphenyl)piperazin-1-yl]-2-oxoethyl]-4H-isoquinoline-1,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25N3O3
assistant