You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(Z)-[2-hydroxy-2-[4-(1-hydroxyethyl)phenyl]-1-(6-nitro-3-oxo-4H-quinoxalin-2-yl)ethylidene]amino]pyridine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H20N6O6
assistant