Component of garlic oil which inhibits platelet aggregation. Synthesis, identification by GC: D. M. Oaks et al., Anal. Chem. 36, 1560 (1964). Isoln from garlic oil, effect on platelet-rich plasma: T. Ariga et al., Lancet 1, 150 (1981). Improved synthesis: A. W. Mott, G. Barany, Synthesis 1984, 657. Use as antithrombotic agent: JP Kokai 82 209218 (1982 to Alcon), C.A. 98, 95692n (1983).