You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[1-[3-(azetidin-3-yl)-5-chloro-4-fluoro-2-methoxyphenyl]ethyl]-3-methylpyrazolo[3,4-d]pyrimidin-4-amine;hydrochloride ?
user
C18H21Cl2FN6O
assistant