Semaglutide Impurity 23

(5S,11S,14S,17S,20S,23S,26S,29S,32S,35S,38S,41S,44S,50S,53S,56S,59S,62S,65S,68S,71S,74S,77S,80S,86S) -20- ((1H-indol-3-yl) methyl) -86-amino-44- (3-amino-3-oxopropyl) -35- (4-aminobutyl) -29,77-dibenzyl-26- ((S) -sec-butyl) -32,50-bis (2-carboxyethyl) -68- (carboxymethyl) -5,11-bis (3-guanidinopropyl) -56- (4-hydroxybenzyl) -74,80-bis ((R) -1-hydroxyethyl) -59,62,71-tris (hydroxymethyl) -17,53-diisobutyl-14,65-diisopropyl-23,38,41-trimethyl-4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,64,67,70,73,76,79,82,85-octacosaoxo-3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84-octacosaazanonaoctacontanedioic acid