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 (E)-3-(2-chlorophenyl)-1-[4-(6-methylpyridazin-3-yl)oxypiperidin-1-yl]prop-2-en-1-one .
user
C19H20ClN3O2
assistant