5-(1-Hydroxy-2-(isopropylamino)ethyl)benzene-1,3-diol; 3,5-Dihydroxy-α-[(isopropylamino)methyl]benzyl alcohol; 3,5-Dihydroxy-α-[(isopropylamino)methyl]benzenemethanol; (±)-Metaproterenol; Metaproterenol;