You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-cyclopropyl-1-[2-[4-(4-fluorophenyl)-4H-pyrrolo[1,2-a]quinoxalin-5-yl]-2-oxoethyl]-3,3-dimethylurea by IUPAC nomenclature, provide its molecular formula.
user
C25H25FN4O2
assistant