You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-(aminomethyl)cyclopentyl]-2-(5-methyl-1,3-dioxoisoindol-2-yl)propanamide;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24ClN3O3
assistant