You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-[(3-methylpyrrolidin-3-yl)methyl]piperidin-3-yl]piperazin-2-one;dihydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H30Cl2N4O
assistant