Linaclotide

(2S)-2-{[(1R,4S,7S,13S,16R,21R,24R,27S,30S,33R,38R,44S)-21-amino-13-(carbamoylmethyl)-27-(2-carboxyethyl)-44-[(1R)-1-hydroxyethyl]-30-[(4-hydroxyphenyl)methyl]-4-methyl-3,6,12,15,22,25,28,31,40,43,46,51-dodecaoxo-18,19,35,36,48,49-hexathia-2,5,11,14,23,26,29,32,39,42,45,52-dodecaazatetracyclo[22.22.4.2^{16,33}.0^{7,11}]dopentacontan-38-yl]formamido}-3-(4-hydroxyphenyl)propanoic acid; acetic acid

(2S)-2-{[(1R,4S,7S,13S,16R,21R,24R,27S,30S,33R,38R)-21-amino-13-(carbamoylmethyl)-27-(2-carboxyethyl)-44-[(1R)-1-hydroxyethyl]-30-[(4-hydroxyphenyl)methyl]-4-methyl-3,6,12,15,22,25,28,31,40,43,46,51-dodecaoxo-18,19,35,36,48,49-hexathia-2,5,11,14,23,26,29,32,39,42,45,52-dodecaazatetracyclo[22.22.4.2^{16,33}.0^{7,11}]dopentacontan-38-yl]formamido}-3-(4-hydroxyphenyl)propanoic acid