You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (1R,4aR,6S,8aS)-8a-hydroxy-4a-(5-methoxy-2-methylphenyl)-1-methyl-2-(2,2,2-trifluoroethyl)spiro[1,3,4,5,7,8-hexahydroisoquinoline-6,5'-imidazolidine]-2',4'-dione is given. What is its corresponding molecular formula?
user
C22H28F3N3O4
assistant