TL;DR: In this paper, the methanol extract of the roots of Gnidia involucrata (Thymelaeaceae) led to the isolation and characterization of two new 3,8"-biflavonoid diastereoisomers, named GB-4 (6a) and GB- 4a (6b).
Abstract: Investigation of the methanol extract of the roots of Gnidia involucrata (Thymelaeaceae) led to the isolation and characterization of two new 3,8"-biflavonoid diastereoisomers, named GB-4 (6a) and GB-4a (6b). Their absolute configurations were determined in mixture by on-line LC/CD measurements, which also allowed the revision of absolute configurations of the billavanoids GB-1 and GB-2, and the configurational assignment of GB-3.
TL;DR: The most significant conclusion drawn from the molecular analysis is that Gnidia is polyphyletic as currently circumscribed, comprising at least four distinct lineages that are each related to other genera within Thymelaeoideae.