Using CC(C)(C)OC(=O)C1CCCN2C(=O)CC(=O)N12, CCOC(=O)CCBr to produce CCOC(=O)CCC1(CCC(=O)OCC)C(=O)N2CCCC(C(=O)OC(C)(C)C)N2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.