Carbetocin Impurity 32

4- ((((3S,9S,12S,15S,18S,29S,32S,35S,38S,46aS) -18,38-bis (2-amino-2-oxoethyl) -21- ((S) -2- (((S) -1- ((2-amino-2-oxoethyl) amino) -4-methyl-1-oxopentan-2-yl) carbamoyl) pyrrolidine-1-carbonyl) -15,35-bis (3-amino-3-oxopropyl) -12,32-di ((S) -sec-butyl) -9,29-bis (4-hydroxybenzyl) -3-isobutyl-8,28-dimethyl-1,4,7,10,13,16,19,27,30,33,36,39,42-tridecaoxotetratetracontahydro-24H-pyrrolo[2,1-x][1]thia[4,7,10,13,16,19,22,25,28,31,34,37,40]tridecaazacyclotetratetracontin-41-yl) methyl) thio) butanoic acid