Using COC(=O)C(Cc1ccccc1)NC(=O)CCn1cnc2c(=O)[nH]cnc21 to produce O=C(CCn1cnc2c(=O)[nH]cnc21)NC(Cc1ccccc1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.