You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
The molecule is a anti cancer. Use the above information to create a molecule.
user
Cc1ncnc2c1ccn2C1OC(C(=O)c2ccc3c(c2)ncn3C(F)F)C2OC(C)(C)OC21
assistant