Using BrCCOCCBr, CC(C)C1(c2ccccc2O)Sc2ccccc2N(C)C1=O to produce CC(C)C1(c2ccccc2OCCOCCBr)Sc2ccccc2N(C)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.