Using CC(C)(C)OC(=O)N1CCN(C(=O)c2ccc(CN3CCOCC3)cc2)CC1 to produce O=C(c1ccc(CN2CCOCC2)cc1)N1CCNCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.