You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I give you a description of a molecule, and you need to return one molecule in SMILES that meets the description. The description: The molecule is a anti tumor agent and belongs to the anti tumor class of molecules.
user
CN1CCC(=NNC(=S)N2CCCC2c2cccnc2)c2ncccc21
assistant