Using CC1(C)NC(C)(C)C(Br)C(=O)C1Br, CC1(C)OCC(N)C(O)CO1 to produce CC1(C)C=C(C(=O)NC2COC(C)(C)OCC2O)C(C)(C)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.