You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 4-[(3-bromophenyl)diazenyl]-5-methyl-2-[4-(4-methylphenyl)-1,3-thiazol-2-yl]-1H-pyrazol-3-one is given. What is its corresponding molecular formula?
user
C20H16BrN5OS
assistant