Using O=Cc1cnn(-c2ccccc2)c1, Clc1nccnc1N1CCNCC1 to produce Clc1nccnc1N1CCN(Cc2cnn(-c3ccccc3)c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.