You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[4-(2-ethenylphenyl)-1,3-thiazol-2-yl]-5-(4-methylsulfonylpiperazin-1-yl)pyridine-2-carboxamide is given. What is its corresponding molecular formula?
user
C22H23N5O3S2
assistant