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 tumour.
user
COc1cc2c(c3c1c(=O)c1nc4ccccc4nc1n3C)C(OC(C)=O)C(OC(C)=O)C(C)(C)O2
assistant