N-4,5[(acetylamino)methyl]desmopressin; [Asn5(Acm) ] Desmopressin Acetate,(S)-1-((4R,7S,10S,13S,16S)-7-(2-acetamidoethyl)-10-(3-amino-3-oxopropyl)-13-benzyl-16-(4-hydroxybenzyl)-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentaazacycloicosane-4-carbonyl)-N-((S)-1-((2-amino-2-oxoethyl)amino)-5-guanidino-1-oxopentan-2-yl)pyrrolidine-2-carboxamide acetate,Desmopressin Impurity