You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(6-methylpyridin-3-yl)-1-[(3S)-3-(4-methyl-1,3-thiazol-2-yl)piperidin-1-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21N3OS
assistant