(2S,2'R)-2,2'-(ethane-1,2-diylbis(azanediyl))bis(butan-1-ol) dihydrochloride;meso-N,N'-Bis[1-(hydroxymethyl)propyl]ethylenediamine; rel-(2R,2'S)-2,2'-(1,2-Ethanediyldiimino)bis[1-butanol]; USP Ethambutol Related Compound A;rel-(R,S)-Ethambutol; (2R,2'S-Ethambutol) DiHCl