Cobicistat Impurity 18

Chemical Name: ethyl (2s)-2-[(methyl{[2-(propan-2-yl)-1,3-thiazol-4-yl] methyl} carbamoyl) amino]-4-(morpholin-4-yl) butanoate oxalate.

Synonym: ethyl (S)-2-(3-((2-isopropylthiazol-4-yl)methyl)-3-methylureido)-4-morpholinobutanoate oxalate

Smile: O=C(C(O)=O)O.CN(C(N[C@H](C(OCC)=O)CCN1CCOCC1)=O)CC2=CSC(C(C)C)=N2