You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[[2-(3-chloro-4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[b]pyridin-4-yl]amino]phenyl]acetamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H20Cl2FN3O
assistant