2,2,2-trifluoroacetic acid compound with (Z)-1-((5Z,8Z,11Z,14Z,17Z)-13-benzyl-2,3,4,5,6-d5-6,9,12,15,18-pentahydroxy-7-(2-hydroxy-2-iminoethyl)-10-(3-hydroxy-3-iminopropyl)-16-(4-hydroxybenzyl)-1,2-dithia-5,8,11,14,17-pentaazacycloicosa-5,8,11,14,17-pentaene-4-carbonyl)-N-((Z)-5-guanidino-1-hydroxy-1-((2-hydroxy-2-iminoethyl)imino)pentan-2-yl)pyrrolidine-2-carbimidic acid (1:1),2,2,2-trifluoroacetic acid compound with (Z)-1-((5Z,8Z,11Z,14Z,17Z)-13-benzyl-2,3,4,5,6-d5-6,9,12,15,18-pentahydroxy-7-(2-hydroxy-2-iminoethyl)-10-(3-hydroxy-3-iminopropyl)-16-(4-hydroxybenzyl)-1,2-dithia-5,8,11,14,17-pentaazacycloicosa-5,8,11,14,17-pentaene-4-carbonyl)-N-((Z)-5-guanidino-1-hydroxy-1-((2-hydroxy-2-iminoethyl)imino)pentan-2-yl)pyrrolidine-2-carbimidic acid (1:1),"Labeled Desmopressin, intended for use as an internal standard for the quantification of Desmopressin by GC- or LC-mass spectrometry.",Desmopressin Stable Isotopes