You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the cancer treatment class of molecules. Please represent the molecule in SMILES.
user
COC(=O)c1ccc2nc(C(C)C)n(-c3ccc4c(c3)NC(O)N4)c2c1
assistant