Using COC(=O)C(=Cc1cc(C)c2[nH]ncc2c1)CC(=O)O to produce COC(=O)C(CC(=O)O)Cc1cc(C)c2[nH]ncc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.