Using COc1cccc(-c2ccc3c(c2)C2(COC(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)=N2)C2(COC2)CO3)n1 to produce COc1cccc(-c2ccc3c(c2)C2(COC(N)=N2)C2(COC2)CO3)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.