Using COCC(C)Nc1cc(-c2ccnc(Cl)n2)ncn1, Nc1cccc(Cl)c1 to produce COCC(C)Nc1cc(-c2ccnc(Nc3cccc(Cl)c3)n2)ncn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.