Chemical structure of Helmidiol; (-)-Pyrenophorol; (3E,5S,8R,11E,13S,16R)-5,13-Dihydroxy-8,16-dimethyl-1,9-dioxacyclohexadeca-3,11-diene-2,10-dione.
Supplier Page from United States Biological for (-)-Pyrenophorol