Cycloolivil (Isoolivil) is a natural polyphenolic compound found in olive trees that exhibits significant radical scavenging and antioxidant activities. It may prevent thrombotic complications associated with platelet hyperaggregability and serve as a foundational compound for further research.

Cycloolivil reduced the ability of thrombin to stimulate platelet aggregation. Cycloolivil reduced thrombin-evoked Ca(2+) release and entry to a similar extent to hydroxytyrosol. This effect was greater in platelets from patients with type 2 diabetes mellitus than in controls. Thrombin-, thapsigargin- and 2,5-di-(tert-butyl)-1,4-hydroquinone (TBHQ)-evoked protein tyrosine phosphorylation, which is involved in Ca(2+) signalling and platelet aggregation, is inhibited by Cycloolivil. Cycloolivil is a natural oxygen radical scavenger that reduces thrombin-induced protein tyrosine phosphorylation, Ca(2+) signalling and platelet aggregation[1].