Ritonavir Impurity S

Chemical Name: 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-methyl butanoyl]amino]-2-hydroxy-5-phenyl pentyl] carbamate