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-bromo-6-(hydroxymethyl)-2-[(4-methoxyphenyl)methyl]pyridazin-3-one;methyl 5-bromo-6-oxo-1H-pyridazine-3-carboxylate .
user
C19H18Br2N4O6
assistant