You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-imino-4-propyl-9-pyridin-4-yl-10,11-dioxatricyclo[5.3.2.01,6]dodecane-7,8,8-tricarbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H21N5O2
assistant