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 5-[4-[2-(3-bromophenyl)sulfanylacetyl]piperazin-1-yl]-2-(furan-2-yl)-1,3-oxazole-4-carbonitrile .
user
C20H17BrN4O3S
assistant