Using CC1(C)OB(B2OC(C)(C)C(C)(C)O2)OC1(C)C, Brc1cccc2c1CCOC2C1=NCCN1 to produce Oc1cccc2c1CCOC2C1=NCCN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.