Levosimendan Impurity 12

Chemical Name: (5R,5'R)-6,6'-(((Z)-Triaz-1-ene-1,3-diyl)bis(4,1-phenylene))bis(5-methyl-4,5-dihydropyridazin-3(2H)-one)

Synonym: (4R,5S,6S)-3-(((3S,5S)-5-(bis(methyl-d3)carbamoyl)pyrrolidin-3-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid