Using Cc1nc2cc(-c3nc4ccccc4o3)ccc2n1CCNC(=O)OC(C)(C)C to produce Cc1nc2cc(-c3nc4ccccc4o3)ccc2n1CCN, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.