Using CCCBr, COCC1(COC)Oc2ccc(C#N)cc2[C@@H](Nc2ccc(=O)[nH]n2)[C@@H]1O to produce CCCn1nc(N[C@@H]2c3cc(C#N)ccc3OC(COC)(COC)[C@H]2O)ccc1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.