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-[(3R)-3-(4-bromophenyl)-2-propanoyl-3,4-dihydropyrazol-5-yl]-6-hydroxy-1,3-dimethyl-2-sulfanylidenepyrimidin-4-one .
user
C18H19BrN4O3S
assistant