1-(3-(Butoxymethyl)-4-(2-hydroxy-3-(isopropylamino)propoxy)phenyl)propanone maleate (2:1) 1-Propanone, 1-(3-(butoxymethyl)-4-(2-hydroxy-3-((1-methylethyl)amino)propoxy)phenyl)-, (E)-2-butenedioate (2:1) (salt) 127627-21-8