Kazumoto Miyahara

Digitalis saponins—IV : Structure of F-gitonin☆

Abstract F-gitonin, a saponin from the leaves of Digitalis purpurea L., is shown to be O-β-D-glucopyranosyl-(1→2 glc 1)-O-β-D-xylopyranosyl-(1→3glc 1)-O-β-D-glucopyranosyl-(1→4)-O-β-D-galactopyranosyl 25D, 5α-spirostane-2α,3β-diol (gitogenin β-lycotetraoside) (I) and the conjugation of lycotetraose with 3β-hydroxyl group of gitogenin is definitely proved.

Spirostane derivatives highly oxygenated at A and B rings from the rhizomes of roth and of baker

Abstract Two steroidal compounds BR-1 (I) and −2 (II) which had been obtained from the rhizomes of Campylandra aurantiaca Baker, were isolated also from those of Rohdea japonica Roth. They were identified, respectively, by X-ray analysis and chemical correlation as 1β,2β,3β,4β,5β,7α-hydroxy-spirost-25(27)-en-6-one and its corresponding 6β-hydroxy compound.