Using O=C1CCC(=O)O1, COC(=O)C[C@@H]1NCCN(CC(=O)OC)C1=O to produce COC(=O)C[C@H]1C(=O)N(CC(=O)OC)CCN1C(=O)CCC(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.