1,3-Didocosahexaenoyl-rac-glycerol is a diacylglycerol that contains docosahexaenoic acid at the sn-1 and sn-3 positions. It has been used in the synthesis of triacylglycerols that contain DHA at their sn-1 and sn-3 positions.1
References
1. Gudmundsdottir, A.V., Hansen, K.-A., Magnusson, C.D., et al. Synthesis of reversed structured triacylglycerols possessing EPA and DHA at their terminal positions. Tetrahedron 71(45), 8544-8550 (2015).