The two macrocyclic lipids 2-hydroxymethyl-1,4-dioxacycloicosane-5,20-dione (1) and 3-hydroxy-1,5-dioxacyclohenicosane-6,21-dione (2) have been isolated from the fruits of Thapsia garganica. Tethered lipids are unprecedented in the plant kingdom.
Liu, Huizhen,Olsen, Carl Erik,Christensen, S. Brogger