You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-chloro-N-(4-imidazo[2,1-b][1,3]thiazol-6-ylphenyl)-5-(methylsulfamoyl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H15ClN4O3S2
assistant