Using COc1cc(NC(=O)N(Cc2ccccc2)CC2CCN(C(=O)OC(C)(C)C)CC2)c(O)c(C(C)(C)C)c1 to produce COc1cc(NC(=O)N(Cc2ccccc2)CC2CCNCC2)c(O)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.