Browsing by Author "ZHOU, L"

Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    DITERPENOIDS FROM GRINDELIA-TARAPACANA
    (1995) ZHOU, L; FUENTES, ER; HOFFMANN, JJ; TIMMERMANN, BN
    Seven new and two known diterpenoids, as well as alpha-spinasterol, were isolated from Grindelia tarapacana. The new diterpenoids were fully characterized, on the basis of spectroscopic analysis and chemical evidence, as 14,15-dihydroxy-13-epi-manoyloxide (tarapacol), 15-acetoxy-14-hydroxy-13-epi-manoyloxide (tarapacol 15-acetate), 14,15-diacetoxy-13-epi-manoyloxide (tarapacol diacetate), 11 alpha,14,15-trihydroxy-13-epi-manoyloxide (tarapacanol A), 14,15-diacetoxy-11 alpha-hydroxy-13-epi-manoyloxide (tarapacanol A 14,15-diacetate), 14,15-dihydroxy-11-keto-13-epi-manoyloxide (tarapacanone) and 12 alpha,14,15-trihydroxy-13-epi-manoyloxide (tarapacanol B). The known diterpenoids were identified as 13-epi-manoyloxide and 12 alpha-hydroxy-13-epi-manoyloxide.