You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methoxy-9-(3-methoxy-4-nitrophenyl)-3-[3-(3-oxoisoquinolin-2-yl)propyl]-5,7,8,11-tetrahydrobenzo[b][1,4]benzodiazepin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H30N4O6
assistant