3-Chloro-6-hydrazinopyridazine17284-97-8100 % similar 6-Chloro-N-methyl-3-pyridazinamine14959-32-160 % similar 3-Amino-6-chloropyridazine5469-69-245 % similar 3,6-Dichloropyridazine141-30-033 % similar 6-Chloro-2-pyridinamine45644-21-130 % similar