Using COC(=O)C(C(=O)OC)C1CCC(C)(C)N1C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1C(CC(=O)O)CCC1(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.