Using CCOC(=O)N1CCN(C2Cc3cc(Br)ccc3Sc3ccccc32)CC1 to produce Brc1ccc2c(c1)CC(N1CCNCC1)c1ccccc1S2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.