You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 6-bromo-2-cyclohexyl-3'-methyl-2'-methylsulfanylspiro[2,3-dihydrochromene-4,5'-imidazole]-4'-one is given. What is its corresponding molecular formula?
user
C19H23BrN2O2S
assistant