Sorafenib EP Impurity E

Chemical Name: 4,4′-[carbonylbis(azanediyl-4,1-phenyleneoxy)]bis(N-methylpyridine-2-carboxamide) (as per EP) N,N’-Bis{4-[2-(N-methylcarbamoyl)-4-pyridyloxy]phenyl}urea (as per USP)

Smile: O=C(NC)C1=CC(OC2=CC=C(NC(NC3=CC=C(OC4=CC=NC(C(NC)=O)=C4)C=C3)=O)C=C2)=CC=N1