Using COC(=O)CNC1CC(C)(C)N(C)C(C)(C)C1, CN1C(C)(C)CC(O)CC1(C)C to produce CN1C(C)(C)CC(NCC(=O)OC2CC(C)(C)N(C)C(C)(C)C2)CC1(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.