You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-[2-(3-chlorophenyl)-4-methyl-1,3-thiazole-5-carbonyl]piperidin-4-yl]pyridine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21ClN4O2S
assistant