You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-chloro-N-[4-methyl-5-[(4-methylpiperidin-1-yl)methyl]-1,3-thiazol-2-yl]-1H-indole-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H23ClN4OS
assistant