1-(3,4,5-Trimethoxy)phenyl-1,4-dihydro-3-methoxy-4-oxopyridazine 146824-90-0 3-Methoxy-1-(3,4,5-trimethoxyphenyl)-4(1H)-pyridazinone 4(1H)-Pyridazinone, 3-methoxy-1-(3,4,5-trimethoxyphenyl)- Trimethoxy-3,4,5 phenyl-1 dihydro-1,4 oxo-4 methoxy-3 pyridazine [French]