Using COC(=O)C1CC2CN(C(=O)OC(C)(C)C)CC(C1)C2=O to produce COC(=O)C1CC2CC(C1)CN(C(=O)OC(C)(C)C)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.