SEARCH Articles Figures Tables Pyridazine 3-chloro-6-methyl Pyridazine 4- methyl-3,6-diphenyl Pyridazine, 3-amino-6-methyl Pyridazine, 3-bromo-6-methyl Pyridazine-3-thione, 6-methyl Pyridazines methylation Pyridazines, methyl-, acidity