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