Using CC(C)(C)OC(=O)[C@H]1C[C@H](Oc2ccc(Cl)c3c2C2(CCCCC2)NC(=O)N3)C1 to produce O=C1Nc2c(Cl)ccc(O[C@H]3C[C@H](C(=O)O)C3)c2C2(CCCCC2)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.