Ritonavir EP Impurity N

Chemical Name: Thiazol-5-yl-methyl [(1S,3S,4S)-1-benzyl-3-hydroxy-4-[[(2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoyl] amino]-5-phenylpentyl]carbamate (as per EP); Thiazol-5-ylmethyl (2S,4S,5S)-4-hydroxy-5-[(S)-2-{3-[(2-isopropylthiazol-4-yl)methyl]-3-methylureido}-3-methylbutanamido]-1,6-diphenylhexan-2-ylcarbamate (as per USP)