You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (3R,3'R,5'S)-3'-chloro-5'-(3-chlorophenyl)-3'-(2,2-dimethylpropoxy)spiro[1H-indole-3,4'-cyclohexane]-1',2-dione .
user
C24H25Cl2NO3
assistant