Using CC(C)(C)[Si](C)(C)O[C@H]1CC[C@H](Nc2ncc3c(n2)NC(=O)N(c2ccccc2Cl)C3)CC1, COC(=O)CBr to produce COC(=O)CN1C(=O)N(c2ccccc2Cl)Cc2cnc(N[C@H]3CC[C@H](O[Si](C)(C)C(C)(C)C)CC3)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.