Glucosinolate distribution in aerial parts of Degenia velebitica.

The glucosinolates present in the leaf, stem, and seed extracts of Degenia velebitica (Degen) Hayek were characterized and quantified according to the ISO 9167-1 method, which is based on the HPLC analysis of desulfoglucosinolates. The stems contained glucoalyssin (3a) as the major compound as well as glucoberteroin (1a) and glucoaubrietin (4a). The leaves contained three glucosinolates, the major one being 3a, followed by glucobrassicanapin (2a) and 1a. Glucoberteroin (1a) was the major glucosinolate in the seeds, along with the two minor glucosinolates 3a and glucoerucin (5a). The content of 1a in the whole, non-defatted seeds amounted to 4% (w/w). The compound was characterized as its desulfo counterpart by spectroscopic techniques.