Using O=C1COC2(CCNCC2)CN1, Clc1nc(N2CCOCC2)c2sc(CBr)cc2n1 to produce O=C1COC2(CCN(Cc3cc4nc(Cl)nc(N5CCOCC5)c4s3)CC2)CN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.