Using O=C(NC1=NN(c2ccc(C(=O)C(F)(F)F)cc2)CC1)C(F)(F)F, CCC(=O)OC(=O)CC to produce CCC(=O)NC1=NN(c2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.