Using COC(=O)c1cc(O)no1, CC1(C)OC2C(CO)OC(n3cnc4c(Cl)ncnc43)C2O1 to produce COC(=O)c1cc(OCC2OC(n3cnc4c(Cl)ncnc43)C3OC(C)(C)OC23)no1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.