Using Clc1nc(-c2ccncc2)ns1, COc1cccc(CCN2CCNCC2)c1 to produce COc1cccc(CCN2CCN(c3nc(-c4ccncc4)ns3)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.