Using OCc1ccncc1, Clc1ccc(Nc2nnc(Cl)c3ccccc23)cc1 to produce Clc1ccc(Nc2nnc(OCc3ccncc3)c3ccccc23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.