Using CCO, CCOC(=O)C[C@@H]1CCc2cc(OCCc3nc(Br)sc3C)ccc21 to produce Cc1sc(-c2ccc(C(C)C)cc2)nc1CCOc1ccc2c(c1)CC[C@H]2CC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.