Synonyms: Polymyxin B;polymyxin B sulfate usp;N-[3-Amino-1-[[1-[[3-amino-1-[[6,9,18-tris(2-aminoethyl)-15-benzyl-3-(1-hydroxyethyl)-12-(2-methylpropyl)-2,5,8,11,14,17,20-heptaoxo-1,4,7,10,13,16,19-heptazacyclotricos-21-yl]carbamoyl]propyl]carbamoyl]-2-hydroxy-propyl]carbamoyl]propyl]-6-methyl-octanamide sulfuric acid; Polymyxin B Sulphate;Polymyxin B sulfate; Polymyxin B sulfate salt; Polymyxin B sulfate; Polymyxin B solution; Polymyxin B 2,5-SULFATE; Polymyxin B (PMB);