Using CCOC(=O)CC(C=CCCCCCNC(=O)OC(C)(C)C)c1cnc(C)nc1 to produce CCOC(=O)CC(CCCCCCCNC(=O)OC(C)(C)C)c1cnc(C)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.