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 belongs to the cancer treatment class of molecules. Use the above information to create a molecule.
user
CC1COCC1N1CCN(c2ccc(-c3cc(-c4cnn(C)c4)cn4ncc(C#N)c34)cn2)CC1
assistant