p. 477 - 482
(1993)6-(p-chlorophenyl)-3(2H)-pyridazinone
6-(4-Chloro-phenyl)-4-(5-oxo-1,3-diphenyl-4,5-dihydro-1H-pyrazol-4-yl)-4,5-dihydro-2H-pyridazin-3-one
3-Chloro-4-(5-chloro-1,3-diphenyl-1H-pyrazol-4-yl)-6-(4-chloro-phenyl)-pyridazine
6-(4-Chloro-phenyl)-4-(1,3-diphenyl-5-thioxo-4,5-dihydro-1H-pyrazol-4-yl)-2H-pyridazine-3-thione
[6-(4-Chloro-phenyl)-4-(5-hydrazino-1,3-diphenyl-1H-pyrazol-4-yl)-pyridazin-3-yl]-hydrazine