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