11,20-Epoxy-1,11,12-trihydroxy-15-(2-undecenoyl)oxypicras-3,13(21)-diene-2,16-dione 87790-39-4 Picrasa-3,13(21)-diene-2,16-dione, 11,20-epoxy-1,11,12-trihydroxy-15-((1-oxo-2-undecenyl)oxy)-, (1beta,11beta,12alpha,15beta(E))- Sun 0237 Sun-0237