Using O=C1CCN(C(=O)Nc2ccccc2C(=O)Nc2ccc(Cl)cn2)CC1, CN1CCCNCC1 to produce CN1CCCN(C2CCN(C(=O)Nc3ccccc3C(=O)Nc3ccc(Cl)cn3)CC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.