You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule methyl (3R)-3-(4-hydroxy-6-methyl-2-oxo-1H-pyridin-3-yl)-3-(7-methoxy-2-oxo-1H-quinolin-3-yl)propanoate ?
user
C20H20N2O6
assistant