Biological and Biomedical Sciences
A tricyclic labdane type diterpene was isolated for the first time from ethyl acetate soluble part of Phlomis bracteosa. Its structure was confirmed by x-ray which was found to be marrubiin. When studied in isolated rabbit jejunum, marrubiin caused concentration-dependent relaxation of spontaneous and high K+ (80 mM)-induced contractions, like that caused by verapamil, indicating that marrubiin exhibits spasmolytic activity, possibly mediated through Ca++ channel blocking action.
Journal of Pharmacy Research
Shah, M. R.,
(2011). Antispasmodic and Ca++ antagonist potential of marrubiin, a labdane type diterpene from Phlomis bracteosa. Journal of Pharmacy Research, 4(1), 178-180.
Available at: https://ecommons.aku.edu/pakistan_fhs_mc_bbs/227