You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-(2-chlorophenyl)sulfonyl-1-[5-chloro-1-[3-(trifluoromethyl)phenyl]imidazol-4-yl]ethanone .
user
C18H11Cl2F3N2O3S
assistant