You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-5-[(8-propan-2-yl-2-azabicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)oxymethoxy]pyridine-4-carbaldehyde is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H20N2O4
assistant