Emtricitabine Impurity 19

Chemical Name: ((2R,5S)-5-(4-amino-5-fluoro-2-oxopyrimidin-1(2H)-yl)-1,3-oxathiolan-2-yl)methyl hydrogen ((((R)-1-(6-amino-9H-purin-9-yl)propan-2-yl)oxy)methyl)phosphonate

Smile: NC1=C2C(N(C[C@@H](C)OCP(OC[C@H]3SC[C@@H](N4C=C(F)C(N)=NC4=O)O3)(O)=O)C=N2)=NC=N1