Using CC(C)(C)OC(=O)NCCCBr, CCOC(=O)CC1OB(O)c2cc(Oc3cnccn3)cc(O)c21 to produce CCOC(=O)CC1OB(O)c2cc(Oc3cnccn3)cc(OCCNC(=O)OC(C)(C)C)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.