Synonym(s): (-)-OR-1259; (R)-Simendan; 2-[2-[4-[(4R)-1,4,5,6-Tetrahydro-4-methyl-6-oxo-3-pyridazinyl]phenyl]hydrazinylidene]-propanedinitrile; OR 1259; R)-((4-(1,4,5,6-Tetrahydro-4-methyl-6-oxo-3-pyridazinyl)phenyl)hydrazono) propanedintrile Empirical Formula:...