Using CC1(OC(=O)CCl)C2CC3CC(C2)CC1C3, O=C(O)CO to produce CC1(OC(=O)COC(=O)CO)C2CC3CC(C2)CC1C3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.