Using COc1cc(OC2CCN(C(=O)OC(C)(C)C)CC2)c2c(Nc3c(Cl)ccc4c3OCO4)ncnc2c1 to produce COc1cc(OC2CCNCC2)c2c(Nc3c(Cl)ccc4c3OCO4)ncnc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.