You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (E,4R)-4-methyl-6-[6-(6-propylpyridin-2-yl)oxypyridin-3-yl]hex-5-en-2-one using the IUPAC nomenclature.
user
C20H24N2O2
assistant