Using CN(CC1CCc2c(O)cccc2C1)c1cnc(-c2ccccc2)c(-c2ccccc2)n1, CC(C)(C)OC(=O)CBr to produce CN(CC1CCc2c(cccc2OCC(=O)OC(C)(C)C)C1)c1cnc(-c2ccccc2)c(-c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.