You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Suppose there is a molecule that meets the following description: The molecule is both a environmental contaminant and a nutrient. Please write the SMILES representation of it.
user
COC1=CC(C)C2CC3OC(=O)CC4C(C)=C(OC)C(=O)C(C2(C)C1=O)C34C
assistant