Using O=C1CCCc2c1cccc2-c1ccc2nc(-c3ccc(Cl)cc3)cn2c1 to produce OC1CCCc2c(-c3ccc4nc(-c5ccc(Cl)cc5)cn4c3)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.