Daptomycin Impurity 44

3- (4-amino-2- (2-decanamido-3- (1H-indol-3-yl) propanamido) -4-oxobutanamido) -4- ((17- (2- (2-aminophenyl) -2-oxoethyl) -27- (3-aminopropyl) -5- (carboxymethyl) -14- (1-carboxypropan-2-yl) -11- (hydroxymethyl) -2,20-dimethyl-3,6,9,12,15,18,22,25,28,32,33-undecaoxo-19-oxa-1,4,7,10,13,16,23,26,29-nonaazabicyclo[28.2.1]tritriacontan-21-yl) amino) -4-oxobutanoic acid