Using Oc1ccc2c(c1)CCC2, O=C(N[C@H]1CC[C@@H](C(=O)O)CC1)OCc1ccccc1 to produce O=C(N[C@H]1CC[C@@H](C(=O)Oc2ccc3c(c2)CCC3)CC1)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.