You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-(4-chloro-3-nitrophenyl)-1-ethyl-6-imino-8-methyl-2,7-dioxabicyclo[3.2.1]octane-4,4,5-tricarbonitrile is given. What is its corresponding molecular formula?
user
C18H14ClN5O4
assistant