Using OB(O)c1ccc2c(c1)OCO2, Cc1cc2nc(NC(=O)c3ccc(C(C)(C)O)cc3)cc(Cl)n2n1 to produce CC(C)(O)c1ccc(C(=O)Nc2cc(-c3ccc4c(c3)OCO4)n3nccc3n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.