Using OCCCBr, O=c1[nH]c2ccccc2n1C1CCN(C2CCC3CCc4cccc2c43)CC1 to produce O=c1n(CCCO)c2ccccc2n1C1CCN(C2CCC3CCc4cccc2c43)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.