Using CCc1cncc(Nc2cc(COc3ccc(NC(=O)OC(C)(C)C)c4ccccc34)ccn2)n1 to produce CCc1cncc(Nc2cc(COc3ccc(N)c4ccccc34)ccn2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.