Using COc1ccc2c(c1)CCN1C(=O)CC(=O)CC21, NCCCBr to produce COc1ccc2c(c1)CCN1C(=O)C3=C(CC21)NCCC3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.