Using CN1CCNCC1, O=Cc1ccc2[nH]c(-c3n[nH]c4ccccc34)cc2c1 to produce CN1CCN(Cc2ccc3[nH]c(-c4n[nH]c5ccccc45)cc3c2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.