Using CCOC(=O)C(Cc1ccc2c(NC(=O)c3ccccc3)nccc2c1)(NC(=O)OC(C)(C)C)C(=O)OCC to produce Nc1nccc2cc(CC(N)C(=O)O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.