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: The molecule is anti tumor.
user
COCC(C)(C)COC(=O)Nc1ccc2cc(-c3ccccc3C(F)(F)F)[nH]c(=O)c2c1
assistant