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 ret kinase inhibitor and is cancer treatment. Use the above information to create a molecule.
user
COc1ccc(CNc2ncnc3c2c(C)c(CNC(=O)OC(C)(C)C)n3C(C)C)c(OC)c1
assistant