You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-methoxy-4-nitrophenyl)-3-[4-[2-(methylamino)ethyl]piperidin-1-yl]propanamide;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H29ClN4O4
assistant