You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: It belongs to the cancer treatment class of molecules.
user
O=C1C2C3C=CC(C3)C2C(=O)N1c1c(F)c(F)c(Br)c(F)c1F
assistant