Using CCCC[C@H](CO)NC(=O)c1c(C)nc2c(O)cccn12, BrCC1CCC1 to produce CCCC[C@H](CO)NC(=O)c1c(C)nc2c(OCC3CCC3)cccn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.