Zanamivir EP Impurity A

Chemical Name: (2R,3R,4S)-3-Acetamido-2-[(1R,2R)-3-[[[(2R,3R,4S)-3-acetamido-6-carboxy-2-[(1R,2R)-1,2,3-trihydroxypropyl]-3,4-dihydro-2H-pyran-4-yl]carbamoyl]oxy]-1,2-dihydroxypropyl]-4-carbamimidamido-3,4-dihydro-2H-pyran-6-carboxylic acid (as per EP)

Smile: [H][C@@]1(NC(N)=N)[C@](NC(C)=O)([H])[C@]([H])([C@@]([C@@]([H])(COC(N[C@]2([H])[C@](NC(C)=O)([H])[C@]([H])([C@@]([C@@]([H])(CO)O)(O)[H])OC(C(O)=O)=C2)=O)O)(O)[H])OC(C(O)=O)=C1