 The full structural identities of the hepoxilins and hepoxilin-like compounds in most studies are unclear in two important respects.First, the "R" versus "S" chirality of their hydroxy residue in the initial and most studies thereafter is undefined and therefore given with, for example, HxB3 as 10"R/S"-hydroxy or just 10-hydroxy.Second, the "R","S" versus "S","R" chirality of the epoxide residue in these earlier studies likewise goes undefined and given with, for example, HxB3 as 11,12-epoxide.