Using OB(O)/C=C/c1ccc(Cl)cc1, Cc1nn(-c2cccc(Br)c2)c(C)c1C(=O)O to produce Cc1nn(-c2cccc(/C=C/c3ccc(Cl)cc3)c2)c(C)c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.