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 both a nutrient and a waste product.
user
CC(=O)OC1CCC2(C)C3=C(CCC2C1(C)C)C1(C)CCC2(C)CCC(C)(C)CC2C1(C)CC3
assistant