6-Chloro-N-methyl-3-pyridazinamine14959-32-1100 % similar 3-Chloro-6-hydrazinopyridazine17284-97-860 % similar 3-Amino-6-chloropyridazine5469-69-245 % similar 3,6-Dichloropyridazine141-30-033 % similar 3-Chloro-6-methylpyridazine1121-79-530 % similar