Using Cc1cc(-c2cnc3c(NCC(C)(C)O)nc(Br)cn23)ccc1C(=O)NC1CC1, CCCS to produce CCCSc1cn2c(-c3ccc(C(=O)NC4CC4)c(C)c3)cnc2c(NCC(C)(C)O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.