Daptomycin Impurity 43

2,2'- ((3S,6S,9R,15S,18R,21S,24S,30S,31R) -30- ((S) -2- ((R) -2- ((S) -3- (1H-indol-3-yl) -2-undecanamidopropanamido) -4-amino-4-oxobutanamido) -3-carboxypropanamido) -3- (2- (2-aminophenyl) -2-oxoethyl) -24- (3-aminopropyl) -6- ((R) -1-carboxypropan-2-yl) -9- (hydroxymethyl) -18,31-dimethyl-2,5,8,11,14,17,20,23,26,29-decaoxo-1-oxa-4,7,10,13,16,19,22,25,28-nonaazacyclohentriacontane-15,21-diyl) diacetic acid