Using CCOC(=O)c1cn(C(C)(C)C)c2nc(N3CCC(NC(=O)OC(C)(C)C)C3)ccc2c1=O to produce NC1CCN(c2ccc3c(=O)c(C(=O)O)c[nH]c3n2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.