Aprepitant EP Impurity B

Chemical Name: 5-[[(2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4′-fluorobiphenyl-3-yl)morpholin-4-yl]methyl]-1,2-dihydro-3H-1,2,4-triazol-3-one ( as per EP)

Smile: FC1=CC=C(C2=CC=CC([C@@H]3N(CC4=NC(NN4)=O)CCO[C@@H]3O[C@@H](C5=CC(C(F)(F)F)=CC(C(F)(F)F)=C5)C)=C2)C=C1