Using O=C(Cl)CCCCl, COC(=O)C1C2CC3C(OC(=O)C31)C2O to produce COC(=O)C1C2CC3C(OC(=O)C31)C2OC(=O)CCCCl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.