You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[5-[[(Z)-2-amino-2-(2-oxo-1H-quinolin-3-yl)ethenyl]amino]pyridin-2-yl]morpholin-3-one .
user
C20H19N5O3
assistant