You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (2S)-5'-chloro-1'-[(3-cyanophenyl)methyl]-N-(3,4-dimethylphenyl)-2'-oxospiro[1,3-thiazolidine-2,3'-indole]-3-carboxamide ?
user
C27H23ClN4O2S
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