Using OCCCBr, COc1ccc(O)c(C2Sc3ccccc3N(C)C2=O)c1 to produce COc1ccc(OCCCBr)c(C2Sc3ccccc3N(C)C2=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.