Using O=C(CN1CCC2(CC1)C(=O)Nc1ccccc12)N1CCN(C2CCC2)CC1, O=C([O-])[O-] to produce CN1C(=O)C2(CCN(CC(=O)N3CCN(C4CCC4)CC3)CC2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.