Using C1COCCN1, CC(C)(C)OC(=O)N1CCC(=O)c2ccc(Br)cc21 to produce CC(C)(C)OC(=O)N1CC=C(N2CCOCC2)c2ccc(Br)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.