Using COc1ccc(NN)cc1, O=CC(C=O)c1cccc(C(=O)O)n1 to produce COc1ccc(-n2cc(-c3cccc(C(=O)O)n3)cn2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.