5,6-?-DHTL, a stable metabolite of arachidonic acid, is a potential EDHF that mediates microvascular dilation.

Levi-Rosenzvig R, Beyer AB, Hockenberry J, Shelly Ben-Shushan R, Chuyun D, Atiya S, Tamir S, Gutterman DD, Szuchman-Sapir A.