You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[7-fluoro-5-[(7-fluoro-1-methylindol-2-yl)methyl]-1,2-dimethylindol-3-yl]propanoic acid into molecular formula.
user
C23H22F2N2O2
assistant