You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is a ret kinase inhibitor and is cancer treatment. Please write the SMILES representation of it.
user
CC(C)Nc1ncnc(N)c1C(=N)c1cc2ccc(-c3ncco3)cc2[nH]1
assistant