Using CCOCC, C=C(CO)CO[C@H](CCc1ccccc1Br)c1cccc(COC2CCCCO2)c1 to produce OCC1(CO[C@H](CCc2ccccc2Br)c2cccc(COC3CCCCO3)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.