Using CC(=O)OCCCn1c(=S)[nH]c2cnc3cc(Br)ccc3c21, CI to produce CSc1nc2cnc3cc(Br)ccc3c2n1CCCOC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.