You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-amino-N-[1-(pyridin-2-ylmethyl)piperidin-4-yl]bicyclo[2.2.1]heptane-2-carboxamide;trihydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H31Cl3N4O
assistant