Using O=CC1CN(Cc2ccccc2)CC1c1ccccc1, c1ccc(C2CCNCC2)cc1 to produce c1ccc(CN2CC(CN3CCC(c4ccccc4)CC3)C(c3ccccc3)C2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.