Polymyxin B1

PI14004001 Polymyxin B1 CAS No:4135-11-9 ||Chemical Formula:C56H98N16O13 ||Molecular Weight:1203.49900 ||Exact Mass:1202.74993 ||S)-N-((S)-4-amino-1-(((2S,3R)-1-(((S)-4-amino-1-oxo-1-(((3S,6S,9S,12S,15S,18R,21S)-6,9,18-tris(2-aminoethyl)-15-benzyl-3-((R)-1-hydroxyethyl)-12-isobutyl-2,5,8,11,14,17,20-heptaoxo-1,4,7,10,13,16,19-heptaazacyclotricosan-21-yl)amino)butan-2-yl)amino)-3-hydroxy-1-oxobutan-2-yl)amino)-1-oxobutan-2-yl)-6-methyloctanamide http://www.pipitech.com/polymyxin-impurity-b1.html