Using COCCCl, N#Cc1cc(O)cc(-c2nc(-c3ccccn3)no2)c1 to produce COCCOc1cc(C#N)cc(-c2nc(-c3ccccn3)no2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.