You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1S,2R,3aS,4S,9bR)-4-(4-bromophenyl)-1-chloro-2-(2-nitrophenyl)sulfanyl-2,3,3a,4,5,9b-hexahydro-1H-cyclopenta[c]quinoline-8-carboxylic acid .
user
C25H20BrClN2O4S
assistant