Using CCCSc1nc2c(c(=O)[nH]c(=O)n2C)n1Cc1ccc(Cl)cc1, OC1(CCBr)CC1 to produce CCCSc1nc2c(c(=O)n(CCC3(O)CC3)c(=O)n2C)n1Cc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.