Polymyxin E1; Colimyscine

Colistin-1,3,5,9-tetramethanesulfonic A acid; (5S,8S,11S) -5- (((3S,6S,9S,12S,15R,18S,21S) -9- (2-aminoethyl) -3- ((R) -1-hydroxyethyl) -12,15-diisobutyl-2,5,8,11,14,17,20-heptaoxo-6,18-bis (2- ((sulfomethyl) amino) ethyl) -1,4,7,10,13,16,19-heptaazacyclotricosan-21-yl) carbamoyl) -8- ((R) -1-hydroxyethyl) -11- ((S) -6-methyloctanamido) -7,10-dioxo-2,6,9,14-tetraazapentadecane-1,15-disulfonic acid