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 (2Z)-2-[5-(4-bromophenyl)-4-methyl-1,3-oxathiol-2-ylidene]-3-(4-chlorophenyl)-3-oxopropanenitrile .
user
C19H11BrClNO2S
assistant