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 tumor treatment class of molecules.
user
Cn1ccc2nc(-c3cccc(NC(=O)c4cccc(C(F)(F)F)c4)c3)nc(N3CCCCC3)c21
assistant