Using COS(=O)(=O)OC, Cc1c(C)c2c(c(O)c1C=O)C(C)(C)CCC2(C)C to produce COc1c(C=O)c(C)c(C)c2c1C(C)(C)CCC2(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.