You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3R,3'S,4'R,5'S)-4'-[4-[(2,4-dichlorophenyl)methoxy]-3-methoxyphenyl]-5'-methyl-3'-nitrospiro[1H-indole-3,2'-pyrrolidine]-2-one into its molecular formula.
user
C26H23Cl2N3O5
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