Using COc1cc(CCC[C@H](O)C(=O)OC(C)C)ccc1OCc1nc(-c2ccco2)oc1C to produce COC(=O)[C@@H](O)CCCc1ccc(OCc2nc(-c3ccco3)oc2C)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.