Linaclotide Dimer Impurity 47

((S) -2- (((3S,6R) -1-amino-6- ((R) -2- ((S) -2- ((S) -2- ((R) -2- ((R) -2-amino-3-mercaptopropanamido) -3-mercaptopropanamido) -5- (l1-oxidaneyl) -5-oxopentanamido) -3- (4-hydroxyphenyl) propanamido) -3-mercaptopropanamido) -7-mercapto-1,4,5-trioxoheptan-3-yl) carbamoyl) pyrrolidin-1-yl) -L-alanyl-L-cysteinyl-L-threonylglycyl-L-cysteinyl-L-tyrosine