618458-79-0

4-Amino-6-ethoxy-5-[[4-[(4R)-1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl]phenyl]azo]-α-[[4-[(4R)-1,4,5,6-tetrahydro-4-methyl-6-oxo-3-pyridazinyl]phenyl]hydrazono]-2-pyrimidineacetonitrile is a levosimendan dimer impurity, which is a bioactive enantiomer of racemate, Simendan. Positive inotropic agent with vasodilating activity. Cardiotonic.