Using CCOCCBr, CCOc1cccc(Cc2ncc(C=O)c3cc(O)c(OC)cc23)c1 to produce CCOCCOc1cc2c(C=O)cnc(Cc3cccc(OCC)c3)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.