2H-1,4-Dioxadicyclopent(cd,f)azulene-3,9-dione, 2a,4a,5,6,8,9a,9b,9c-octahydro-2-hydroxy-2,2a,6,9a-tetramethyl-, (2S-(2alpha,2abeta,4aalpha,6beta,9aalpha,9bbeta,9cbeta))- 66607-74-7 Heleniamarin