Polymyxin B2-d7

N- ((S) -4-amino-1- (((2S,3R) -1- (((S) -4-amino-1-oxo-1- (((3S,6S,9S,12S,15R,18S,21S) -6,9,18-tris (2-aminoethyl) -15-benzyl-3- ((R) -1-hydroxyethyl) -12- (2- (methyl-d3) propyl-2,3,3,3-d4) -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-methylheptanamide