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 fouling.
user
C=C(C)C(=O)OCC(COC(=O)C(=C)C)C(=O)OCCS(=O)(=O)O.[Ca]
assistant