Using COc1ccc(-c2ccc3nnc(-c4ccc([N+](=O)[O-])cc4OC)n3c2)cc1, Cl[Sn]Cl to produce COc1ccc(-c2ccc3nnc(-c4ccc(N)cc4OC)n3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.