Using COc1cc(OC[C@@H]2CCCN2C(=O)OC(C)(C)C)c2c(Nc3ccc(F)c(Cl)c3)ncnc2c1 to produce COc1cc(OC[C@@H]2CCCN2)c2c(Nc3ccc(F)c(Cl)c3)ncnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.