1-Methyl-1,2-dihydro-3,6-pyridazinedione 1-Methyl-3,6-pyridazinedione 3,6-Pyridazinedione, 1, 2-dihydro-1-methyl- 5436-01-1 AIDS-124309 AIDS124309 N-Methyl maleic hydrazide N-Methyl-3,6-pyridazinedione NSC21412