Using O=C(O)CCc1ccc(O)cc1, COC(=O)C(Cc1ccc(O)cc1)NC(=O)CO to produce COC(=O)C(Cc1ccc(O)cc1)NC(=O)COC(=O)CCc1ccc(O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.