You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(R)-N-[1-[2-chloro-5-[2-oxo-2-(5-prop-1-ynylpyridin-2-yl)ethyl]phenyl]ethylidene]-2-methylpropane-2-sulfinamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23ClN2O2S
assistant