You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8-chloro-2-[[(4R,5R)-4-hydroxy-7-azaspiro[4.5]decan-7-yl]methyl]-1H-quinolin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23ClN2O2
assistant