Using COC(=O)[C@H](CO)NC(=O)c1cccc2c1NC1CCCC21 to produce O=C(N[C@@H](CO)C(=O)O)c1cccc2c1NC1CCCC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.