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 (3R,7aR)-3-(4-bromophenyl)-6-(3,4-dichlorophenyl)-5-sulfanylidene-3,7a-dihydro-1H-imidazo[1,5-c][1,3]thiazol-7-one .
user
C17H11BrCl2N2OS2
assistant