Using CCOC(=O)COCc1cccnc1, NNc1ccc(Nc2cccc(Cl)c2)nn1 to produce Clc1cccc(Nc2ccc3nnc(COCc4cccnc4)n3n2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.