You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-bromo-7-[2-(1H-inden-2-yl)propan-2-yl]-4,6-dimethyl-5H-cyclopenta[f][1]benzothiole is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H23BrS
assistant