You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-amino-3-(2-butoxyethyl)-5-[2-(4,4-diphenylpiperidin-1-yl)ethyl]-6-methyl-4-(3-nitrophenyl)piperidine-3,5-dicarboxylate into its molecular formula.
user
C39H48N4O7-2
assistant