Using O=S1(=O)CCN(C2CNC2)CC1, O=Cc1nc2c(N3CCOCC3)nc(Cl)nc2s1 to produce O=S1(=O)CCN(C2CN(Cc3nc4c(N5CCOCC5)nc(Cl)nc4s3)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.