You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[8-(8-bromo-7-methylimidazo[1,2-c]pyrimidin-5-yl)-8-azaspiro[4.5]decan-10-yl]-2-methylpropane-2-sulfinamide is given. What is its corresponding molecular formula?
user
C20H30BrN5OS
assistant