You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-amino-N-[(3R,5S)-1-(8-cyanoquinolin-5-yl)-5-methylpiperidin-3-yl]-2-methylpropanamide;hydrochloride into molecular formula.
user
C20H26ClN5O
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