Using C=Cc1cc(N2CCN(Cc3cc(C(=O)OCC)c(=O)n4ccccc34)CC2)ccn1 to produce CCc1cc(N2CCN(Cc3cc(C(=O)O)c(=O)n4ccccc34)CC2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.