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 identified by N-[4-(2,6-dimethylphenoxy)-3-(6-methyl-5-oxo-1,6-naphthyridin-8-yl)phenyl]prop-2-enamide ?
user
C26H23N3O3
assistant