Using CN1CCNCC1, O=Cc1cc2c(=O)[nH]c(-c3ccc(Cl)cc3Cl)cn2n1 to produce CN1CCN(Cc2cc3c(=O)[nH]c(-c4ccc(Cl)cc4Cl)cn3n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.