Using CCCC(C)(CNC(=O)c1c(C)nn2c(OCc3ccccc3)cc(C)cc12)NC(=O)OC(C)(C)C to produce CCCC(C)(CNC(=O)c1c(C)nn2c(O)cc(C)cc12)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.