Using CCCCCCC(C)(C)c1cc(O)c2c(c1)OC(C)(C)C1CC=C(NC(C)=O)CC21 to produce CCCCCCC(C)(C)c1cc(O)c2c(c1)OC(C)(C)C1CCC(NC(C)=O)CC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.