You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-cyclopropyl-8-[4-[1-(methoxyamino)ethenyl]phenyl]-9-methyl-4-oxoquinolizine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H22N2O4
assistant