You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[3-[4-(2,3-dimethylphenyl)piperazin-1-yl]-3-oxopropyl]-5H-pyrimido[5,4-b]indol-4-one ?
user
C25H27N5O2
assistant