Pimobendan N-1

6-(3,4-diaminophenyl)-5-methy/-4,5-dihydropyridazin-3(2H)-one,6-(3,4-Diaminophenyl)-4,5-dihydro-5-methyl-3(2H)-pyridazinone;PiMobendan N-1;3(2H)-Pyridazinone, 6-(3,4-diaMinophenyl)-4,5-dihydro-5-Methyl-