(±) 4 (5) -DiHDPA lactone

(±) 5 (6) -DiHET lactone is a 1,5 cyclic ester derived from (±) 5 (6) -DiHET , which, in turn, is a potential derivative of epoxidation of arachidonic acid at the α-5 double bond. (±) 4 (5) -DiHDPA lactone is a derivative of docosahexaenoic acid that is analogous to (±) 5 (6) -DiHET lactone. It is the 1,4 cyclic ester derived from (±) 4 (5) -DiHDPA, which is produced by epoxidation of DHA at the α-4 double bond. Its biological activity is unknown.