You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[[(3S)-1-(3-cyanoquinolin-2-yl)pyrrolidin-3-yl]amino]-3-thiophen-2-ylpropanamide;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H22ClN5OS
assistant