Using CCOC(=O)c1ccc2[nH]c(-c3ccccc3)cc(=O)c2c1 to produce O=C(O)c1ccc2[nH]c(-c3ccccc3)cc(=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.