Bivalirudin D-Asn Impurity

(15R,21S,24S,27S,30S)-15-(2-amino-2-oxoethyl)-1-((S)-1-((S)-2-((S)-1-((R)-2-amino-3-phenylpropanoyl)pyrrolidine-2-carboxamido)-5-guanidinopentanoyl)pyrrolidin-2-yl)-24-benzyl-30-(((2S,3S)-1-((S)-2-(((S)-4-carboxy-1-(((S)-4-carboxy-1-(((S)-1-(((S)-1-carboxy-3-methylbutyl)amino)-3-(4-hydroxyphenyl)-1-oxopropan-2-yl)amino)-1-oxobutan-2-yl)amino)-1-oxobutan-2-yl)carbamoyl)pyrrolidin-1-yl)-3-methyl-1-oxopentan-2-yl)carbamoyl)-27-(2-carboxyethyl)-21-(carboxymethyl)-1,4,7,10,13,16,19,22,25,28-decaoxo-2,5,8,11,14,17,20,23,26,29-decaazatritriacontan-33-oic acid