You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule tert-butyl 4-(4-heptoxyphenyl)-3-oxopiperazine-1-carboxylate;1-(4-heptoxyphenyl)piperazin-2-one into molecular formula.
user
C39H60N4O6
assistant