Using O=S(=O)(O)O, CC(=O)C1(CCC(=O)OC(C)(C)C)CCCCC1=O to produce CC(C)(C)OC(=O)CCC1(C(=O)O)CCCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.