You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(3S)-3-[3-(2,4-dichlorophenyl)propanoylamino]-6-fluoro-1,2,3,4-tetrahydrocarbazol-9-yl]butanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H25Cl2FN2O3
assistant