Using OCCCBr, COc1cc2c(=O)n(CC(=O)OC(C)(C)C)cnc2cc1O to produce COc1cc2c(=O)n(CC(=O)OC(C)(C)C)cnc2cc1OCCCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.