Using COCc1c(C(=O)OC(C)C)ncc2[nH]c3ccc4oc(C5COC(C)(C)O5)nc4c3c12 to produce COCc1c(C(=O)OC(C)C)ncc2[nH]c3ccc4oc(C(O)CO)nc4c3c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.