Using ClC(=Nc1cccc(Cl)c1Cl)c1cc(Br)cnc1Cl, COC(CN)OC to produce Clc1cccc(-n2ccnc2-c2cc(Br)cnc2Cl)c1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.