英文别名3(2H)-Pyridazinone, 6-(4-aminophenyl)-4,5-dihydro-5-Methyl-, (5S)-; Levosimendan Impurity 17; (5S)-6-(4-Aminophenyl)-4,5-dihydro-5-methyl-3(2H)-pyridazinone; Levosimendan isomer; (4S)-3-(4-aminophenyl)-4-methyl-4,5-dihydro-1H-pyridazin-6-one; 3(2H)-Pyridazinone,6-(4-aminophenyl)-4,5-dihydro-5-methyl-,(S) 
