Using CCOC(=O)CBr, CCCCCCn1c(=O)[nH]c2sc3c(c2c1=O)CCCC3 to produce CCCCCCn1c(=O)c2c3c(sc2n(CC(=O)OCC)c1=O)CCCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.