Using O=C1CCC(=O)O1, CC(CCN1C(=O)c2ccccc2C1=O)Cc1ccccc1 to produce CC(CCN1C(=O)c2ccccc2C1=O)Cc1ccc(C(=O)CCC(=O)O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.