You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[4-[2-(2-piperazin-1-ylethoxy)ethyl]piperazin-1-yl]pyrimidine-5-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H32N6O3
assistant