Using CC[C@H](C)[C@H](NC(=O)n1c(=O)n(CCN2CCOCC2)c2ccccc21)C(=O)OC to produce CC[C@H](C)[C@H](NC(=O)n1c(=O)n(CCN2CCOCC2)c2ccccc21)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.