2-(2-(6-Chloro-3-pyridazinyl)hydrazinylidene)cyclohexanecarboxylic acid ethyl ester 5-25-17-00363 (Beilstein Handbook Reference) 69578-80-9 BRN 0928121 Cyclohexanecarboxylic acid, 2-((6-chloro-3-pyridazinyl)hydrazono)-, ethyl ester Cyclohexanecarboxylic acid, 2-(2-(6-chloro-3-pyridazinyl)hydrazinylidene)-, ethyl ester