Cobicistat Morpholine thiazole ester Impurity

Chemical Name: ethyl N-(methyl{[2-(propan-2-yl)-1,3-thiazol-4-yl]methyl}carbamoyl)-O-[(2S)-2-[(methyl{[2-(propan-2-yl)-1,3-thiazol-4-yl]methyl}carbamoyl) amino]-4-(morpholin-4-yl)butanoyl]-L-homoserinate

Smile: O=C(OCC)[C@H](CCOC([C@@H](NC(N(C)CC1=CSC(C(C)C)=N1)=O)CCN2CCOCC2)=O)NC(N(C)CC3=CSC(C(C)C)=N3)=O