Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-2-hydroxy-4[[(2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoyl ]amino]-5-phenylpentyl]carbamate ; CAS # 155213-67-5 ;

Ritonavir BP Impurity A ; Ureidovaline Ritonavir (USP) ; (2S)-3-Methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl] amino]butanoicacid ; CAS # 154212-61-0 ;

Ritonavir BP Impurity�B ; N-Deacylvaline Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-4-[[(2S)-2-amino-3-methylbutanoyl]amino]-1-benzyl-2-hydroxy-5-phenylpentyl]carbamate ; CAS # 165315-97-9 (HCl salt) ; 765875-58-9 (base) ;

Ritonavir BP Impurity�C ; Acetamido-Alcohol Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-4-(acetylamino)-1-benzyl-2-hydroxy-5-phenylpentyl]carbamate ; CAS # 1010808-43-1 ;

Ritonavir BP Impurity�D ; 2,5-Thiazolylmethyl-dicarbamate Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-2-hydroxy-5-phenyl-4-[[(thiazol-5-yl-methoxy)carbonyl]amino]pentyl]carbamate ;

Ritonavir BP Impurity�E ; Hydroxy Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-2-hydroxy-4-[[(2S)-2-[[[[2-(1-hydroxy-1-methylethyl)thiazol-4-yl]methyl]methylcarbamoyl]amino]-3-methylbutanoyl]amino]-5-phenylpentyl]carbamate ; CAS # 176655-56-

Ritonavir BP Impurity�F ; Hydantoin Amino Alcohol Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-4-[[(2S)-1-benzyl-2-hydroxy-4-[(4S)-4-(1-methylethyl)-2,5-dioxoimidazolidin-1-yl]-5-phenylpentyl]carbamate ; CAS # 1010809-61-6 ;

Ritonavir BP Impurity�G ; Ritonavir Hydroperoxide (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-4-[[(2S)-2-[[[[2-(1-hydroperoxy-1-methylethyl)thiazol-4-yl]methyl]methylcarbamoyl]amino]-3-methylbutanoyl] amino]-2-hydroxy-5-phenylpentyl]carbamate ;

Ritonavir BP Impurity�H ; Hydantoin-Oxazolidinone Ritonavir (USP) ; Des-Isopropylthiazolyl Hydantoin-Oxazolidinone Ritonavir ; CAS # 1010809-43-4 ;

Ritonavir Ethyl Analog (USP) ; 2-Desisopropyl 2-Ethyl Ritonavir ; Thiazol-5-yl-methyl [((1S,2S,4S)-1-benzyl-4[[(2S)-2-[[[[2-ethylthiazol-4-yl]methyl]methylcarbamoyl]amino]-3-methylbutanoyl]amino]-2-hydroxy-5-phenylpentyl]carbamate ; CAS # 165315-26-4 ;

Ritonavir BP Impurity�J ; Ritonavir BOC-Aminoalcohol (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl4-[[(1,1-dimethylethoxy)carbonyl] amino]-2-hydroxy-5-phenylpentyl]carbamate ; CAS # 162849-95-8 ;

Ritonavir BP Impurity�K ; Ritonavir Isobutoxycarbonyl Aminoalcohol (USP) ; Thiazol-5-yl-methyl (1S,2S,4S)-1-benzyl-2-hydroxy-4-[[(2-methylpropoxy) carbonyl] amino]-5-phenylpentyl]carbamate ;

Ritonavir BP Impurity�L ; Oxazolidinone Ritonavir (USP) ; Desthiazolylmethyl Ritonavir ; (4S,5S)-4-benzyl-5-[(2S)-2-[[(2S)-3-methyl-2-[[methyl[[2(1-methylethyl) thiazol-4-yl]methyl]carbamoyl]amino]butanoyl]amino]-3-phenylpropyl] oxazolidin-2-one ; CAS # 2

Ritonavir BP Impurity�M ; Ritonavir Ureidovaline Isobutyl Ester (USP) ; 2-Methylpropyl (2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoate ;

Ritonavir BP Impurity�N ; Ritonavir 4-Hydroxy Isomer (USP) ; 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 ; CAS # 202816-62-

Ritonavir BP Impurity�O ; 3-Epimer Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2R,4S)-1-benzyl-2-hydroxy-4-[[(2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoyl] amino]-5-phenylpentyl]carbamate ; CAS # 1414933-81-5 ;

Ritonavir BP Impurity�P ; Ritonavir Aminoalcohol Urea (USP) ; Bis(thiazol-5-yl-methyl)[carbonylbis[imino[(2S,3S,5S)-3-hydroxy-1,6-diphenylhexane-5,2-diyl]]]dicarbamate ;

Ritonavir BP Impurity�Q ; Ritonavir 3R,5R-Diastereomer (USP) ; Thiazol-5-yl-methyl [(1S,2R,4R)-1-benzyl-2-hydroxy-4-[[(2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoyl] amino]-5-phenylpentyl]carbamate ;

Ritonavir BP Impurity�R ; 5-Epimer Ritonavir (USP) ; Thiazol-5-yl-methyl [(1S,2S,4R)-1-benzyl-2-hydroxy-4-[[(2S)-3-methyl-2-[[methyl[[2-(1-methylethyl)thiazol-4-yl]methyl]carbamoyl]amino]butanoyl] amino]-5-phenylpentyl]carbamate ;

Ritonavir BP Impurity�S ; Ritonavir Valine Urea Analog (USP) ; Thiazol-5-yl-methyl [(1S,2S,4S)-1-benzyl-4-[[(2S)-2[[[(1S,3S,4S)-1-benzyl-3-hydroxy-5-phenyl-4-[[(thiazol-5-ylmethoxy)carbonyl]amino]pentyl]carbamoyl] amino]-3-methylbutanoyl]amino]-2-hydroxy-

Ritonavir BP Impurity�T ; Ritonavir Divalinyl analog (USP) ; CAS # 869368-48-9 ;

Ritonavir BP Impurity�U ; O-Acyl Ritonavir (USP) ;