You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-ethyl-4-[2-[3-(methylaminomethyl)piperidin-1-yl]-2-oxoethyl]piperazine-2,3-dione;hydrochloride ?
user
C15H27ClN4O3
assistant