117820-36-7 2-Propenamide, 3-(4-hydroxy-3-methoxyphenyl)-N-(2-hydroxy-5-oxo-1-cyclopenten-1-yl)-, (E)- 2880 II 2880-II N-(3-Hydroxy-1-oxocyclopent-2-en-2-yl)-3-(4-hydroxy-3-methoxyphenyl)propenamide Streptomyces metabolite 2880 II