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 (4-tert-butylphenyl)-[5-methoxy-1'-(3-methylbut-2-enyl)spiro[2H-indole-3,4'-piperidine]-1-yl]methanone .
user
C29H38N2O2
assistant