You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-chloro-N-(5-methylpyridin-3-yl)imidazo[2,1-b][1,3]thiazole-5-sulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C11H9ClN4O2S2
assistant