You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[2-[[(4S)-4-[3-(diethylamino)propyl]-7-[ethyl(methyl)amino]heptyl]-ethylamino]ethyl-ethylamino]-N-methylpropanamide is given. What is its corresponding molecular formula?
user
C27H59N5O
assistant