Using O=C([O-])O, CC(=O)NC12CC3CC(C1)C(=O)C(C3)C2 to produce CC(=O)NC12CC3CC(C1)OC(=O)C(C3)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.