Using O=C1OCCN1CCN1CCNCC1, O=C1Cc2cc(Cl)ccc2Sc2ccccc21 to produce O=C1OCCN1CCN1CCN(C2=Cc3cc(Cl)ccc3Sc3ccccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.