You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,9-diazaspiro[4.5]decan-2-yl-[3-(3-methoxyphenyl)-1H-pyrazol-5-yl]methanone;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H25ClN4O2
assistant