Using COC(=O)[C@@H](NC(=O)c1ccc(NC(=O)OCc2ccccc2)c(C)c1)[C@@H](C)O to produce COC(=O)C1N=C(c2ccc(NC(=O)OCc3ccccc3)c(C)c2)OC1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.