36725-41-46-(4-chlorophenyl)-5-methyl-4,5-dihydropyridazin-3(2H)-one6-(4-chlorophenyl)-5-methyl-2,3,4,5-tetrahydropyridazin-3-one3-(4-chlorophenyl)-4-methyl-4,5-dihydro-1H-pyridazin-6-oneLevosimendan Impurity 89Cambridge id 5144040CBDivE_012243SCHEMBL11571863VECYAKYVLADWSP-UHFFFAOYSA-NHMS1578H05Cl-5797AKOS001012130