Synthesis, hypotensive and diuretic activities of several 3-hydrazino-5,6-dihydrobenzo[h]cinnolines. Part 10: Pyridazine derivatives.

New 3-hydrazino-5,6-dihydrobenzo[h]cinnolines were prepared, and their effects on arterial pressure, diuresis and Na+ and K+ excretion in conscious normotensive rats were studied.