Using COC(=O)Cc1ccc2c(c1)C(C)(C)CCC2(C)C, O=C=O to produce COC(=O)C(C(=O)O)c1ccc2c(c1)C(C)(C)CCC2(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.