Using O=Cc1ccccc1, Cc1nc2c(N3CCOCC3)nc(Cl)nc2s1 to produce OC(Cc1nc2c(N3CCOCC3)nc(Cl)nc2s1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.