There is provided an isoprenoid according to the general formula (I) wherein R1 and R2 are independently selected from H and alkyl and R3, R4, R5 and R6 are independently selected from groups of the general formula (II) and (III) wherein R7 and R8 each represent a group of general formula CO—R9, in which each R9 is independently selected from H, OH, alkyl and alkoxy groups, or R7 and/or R8 present in R3 and R4 and/or in R5 and R6 combine to form a group of the general formula (IV) wherein R10 is selected from OH and alkoxy or salts thereof. The isoprenoids are of particular use in the preparation of liposomes, for use in the delivery of pharmaceutically active components to a subject human or animal.
