Using CCOC(OCC)N1C(=O)C(c2ncnc3cc(OCCOC)c(OC)cc23)c2cc(Br)ccc21 to produce COCCOc1cc2ncnc(C3C(=O)Nc4ccc(Br)cc43)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.