You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-3-[4-[(3,4-dichlorophenyl)methoxy]phenyl]-1-methyl-7-[(2-methylpropan-2-yl)oxycarbonyl]-2-oxo-8,9-dihydro-6H-pyrido[4,3-g][1,4]benzoxazine-8-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H30Cl2N2O7
assistant