Using COc1ccc(CN2CCNC(=O)C2=O)c(OC)c1, BrCCBr to produce COc1ccc(CN2CCN(CCBr)C(=O)C2=O)c(OC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.