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 anti tumor.
user
CCOC(=O)c1nc2sc3c(c2c(=O)n1-c1cccc(Cl)c1)CCCCC3
assistant