Using Cc1cccc(C(Br)C(=O)c2ccc3c(c2)OCO3)[nH+]1, NC(N)=S to produce Cc1cccc(-c2sc(N)nc2-c2ccc3c(c2)OCO3)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.