Using CC(C)(C)OC(=O)N1CCN(C2(C)CCNCC2)CC1, CCOC(=O)C=O to produce CCOC(=O)CN1CCC(C)(N2CCN(C(=O)OC(C)(C)C)CC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.