8,9-Epoxy-3-isobutyryloxy-10-(2-methylbutanoyl)thymol is a chemical composition of essential oils from Telekia speciosa. It also shows marked antipro-liferative activity against human cancer cell lines in vitro.
ent-8(14),15-pimaradien-3beta-ol (8(14),15-Isopimaradien-3-ol) can induce vascular relaxation. It displays high antibacterial activities (MIC values lower than 10 microg /mL for most pathogens).
ent-11alpha-Hydroxyabieta-8(14),13(15)-dien-16,12alpha-olide shows significant cytotoxic activity against ANA-1 and Jurkat cells with IC50 values 7.12 x 10(-3) and 1.79 x 10(-2) microM.
ent-3-Acetoxy-labda-8(17),13-dien-15-oic acid have vasorelaxant and hypotensive actions, the mechanisms underlying the cardiovascular actions of the labdane involve the activation of the endothelial NO-cGMP pathway, the opening of K+ channels and the alteration on Ca2+ mobilization.
9alpha,13alpha-Epidioxyabiet-8(14)-en-18-oic acid shows potent inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by the tumor promoter 12-O-tetradecanoylphorbol 13-acetate.
9,13β-Epidioxy-8(14)-abieten-18-oic acid has anti-inflammatory activities, it exhibits moderate activities on NO levels in LPS-stimulated murine microglia BV2 cells, with IC50 values of 57.3 ± 0.2 uM. It is also a potential antitumor-promoting diterpenoid, it shows potent inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by the tumor promoter 12-O-tetradecanoylphorbol 13-acetate. 9 α ,13 β -Epidioxyabeit-8(14)en-18-oic acid may contribute to the growth inhibitory effect of the pine needles and may play an important role in the allelopathy of red pine.