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 nutrient.
user
C=C1C(=O)OC2C1C(OC(=O)C(C)=CC)CC(C)(O)C1CC=C(C)C21
assistant