Using COCO[C@@H]1CN(c2cccc(Br)n2)C[C@H]1OCCOC1CCCCO1 to produce COCO[C@@H]1CN(c2cccc(Br)n2)C[C@H]1OCCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.