You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a nutrient and phytoalexin, belonging to the fungicide class of molecules, and is pesticide.
user
O=c1cc(CO)oc(-c2oc(CO)cc(=O)c2O)c1O
assistant