Using O=C(CN1CC=C(c2c[nH]c3cc(Cl)ccc23)CC1)Nc1ccccn1 to produce Clc1ccc2c(C3=CCN(CCNc4ccccn4)CC3)c[nH]c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.