Using CC(C)(C)OC(=O)N1CCc2[nH]c3cccc(Br)c3c2CC1, CC1(C)OBOC1(C)C to produce CC(C)(C)OC(=O)N1CCc2[nH]c3cccc(B4OC(C)(C)C(C)(C)O4)c3c2CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.