Using OCCCBr, COc1cc2c(=O)n(COC(=O)C(C)(C)C)cnc2cc1O to produce COc1cc2c(=O)n(COC(=O)C(C)(C)C)cnc2cc1OCCCBr, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.