You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(2,3-dimethoxybenzoyl)piperazin-1-yl]-3-(4-methyl-1H-indol-3-yl)propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H29N3O4
assistant