You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5E)-5-[[5-(2-methoxy-5-nitrophenyl)furan-2-yl]methylidene]-1-pyridin-4-yl-1,3-diazinane-2,4,6-trione is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H14N4O7
assistant