You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 5-[2-(1-acetyl-5-propan-2-ylspiro[2H-indole-3,4'-piperidine]-1'-yl)-2-oxoethyl]-3-(3-methylbutyl)-2-phenyl-1,3-thiazolidin-4-one is given. What is its corresponding molecular formula?
user
C33H43N3O3S
assistant