You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-aminopropyl(butan-2-yl)amino]-1-(butan-2-ylamino)-2-[2-(2-hydroxyethoxy)ethoxy]ethanol is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H39N3O4
assistant