Using CCOC(=O)CBr, COc1ccc(C2=NN(C3CCN(C(=O)c4cc(O)ccc4C)CC3)C(=O)C2(C)C)cc1OC to produce CCOC(=O)COc1ccc(C)c(C(=O)N2CCC(N3N=C(c4ccc(OC)c(OC)c4)C(C)(C)C3=O)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.