Resumen:
n the first chemical investigation developed on the species Dalea elegans twenty years ago, the
occurrence of two prenylated derivatives of pinocembrin was reported: 20,40-dihydroxy-50-(1000,1000-
dimethylallyl)-6-prenylpinocembrin (6PP) given as a new structure in this family of compounds, and
another derivative of already known structure, 6-prenylpinocembrin (6P). In the present paper, their
structures were again analyzed by using spectroscopic techniques, especially 2D NMR. Based on the
evidence obtained it is proposed the reassignment of both flavanones as: 20,40-dihydroxy-50-(1000,1000-
dimethylallyl)-8-prenylpinocembrin (8PP) for the first and 8-prenylpinocembrin (8P) for the last.
Additionally, triangularin, demethoxymatteucinol, comptonin and 7-hydroxy-5-methoxy-6,8-
dimethylflavanone were isolated from aerial parts of D. elegans and informed by the first time for
this species. All of these compounds were evaluated in vitro in relation to the antityrosinase effect by