Using CCCCOC(=O)c1nc(Br)c2ccc(Oc3ccc(OCCC)cc3)cc2c1O, N#C[Cu] to produce CCCCOC(=O)c1nc(C#N)c2ccc(Oc3ccc(OCCC)cc3)cc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.