Nuevas fuentes naturales de sapogeninas esteroidales XII. Gloriogenina y 12 β-hidroxi-esmilagenina, dos nuevas sapogeninas esteroidales de la Yuca gloriosa Linn.

Abstract

9 páginas, 1 tabla, 3 esquemas.-- Para la parte XI de la serie "Nuevas fuentes naturales de sapogeninas esteroidales" véase http://digital.csic.es/handle/10261/16971From the leaves of the Yuca gloriosa Linn. a spirostan monohydroxy-ketosapogenin is isolated, the physical data of which coincide with those of gloriogenin obtained from the same plant by Dávila and Panizo (2). We established its structure as (25R)-5β-spirostan-3β-ol-12-one. Furthermore, the structure of a second compound, not yet described in the literature, is found to be (25R)-5β-spirostan-3β 12β-diol. β-sitosterol, smilagenin, tigogenin, hecogenin, rockogenin and gitogenin are also obtained and identified by direct comparison with authentic samples.Tres de nosotros (R.F.B., R.H.G. y J.A.S.R.) agradecen al Ministerio de Educación y Ciencia las ayudas recibidas para "Formación de Personal Investigador"