Using CSSC, CN1C(=O)CC[C@]2(C)c3ccc(Br)cc3CC[C@@H]12 to produce CSc1ccc2c(c1)CC[C@H]1N(C)C(=O)CC[C@]21C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.