17934-59-7Relevant academic research and scientific papers
Polyhydroxylated steroidal constituents from the fresh rhizomes of Tupistra yunnanensis
Yang, Qing-Xiong,Zhang, Ying-Jun,Li, Hai-Zhou,Yang, Chong-Ren
, p. 732 - 737 (2005)
Six new polyhydroxylated steroidal saponins, tupistrosides A-F (1-6), together with nine known steroids, were isolated from the fresh rhizomes of Tupistra yunnanensis. Their structures were elucidated to be (25S)-1β,4β,5β-trihydroxy-spirostane-3β-yl O-α-l-arabinopyranoside (1), 1β,24β-dihydroxy-spirost-5,25(27)- dien-3α-yl O-β-d-glucopyranoside (2), (22S,25S)-1α,2β, 3α,5α-tetrahydroxy-furo-spirostane-26-yl O-β-d-glucopyranoside (3), 1β,3α,22 ξ-trihydroxy-furost-5,25(27)-dien-26-yl O-β-d-glucopyranoside (4), 26-O-β-d-glucopyranosyl-1β,22- dihydroxy-furost-5-en-3α-yl O-β-d-glucopyranoside (5) and 22-methoxy-1β,2β,3β,4β,5β,7α-hexahydroxy-furost- 25(27)-en-6-one-26-yl O-β-d-glucopyranoside (6), respectively, by means of spectroscopic analysis and the results of acid hydrolysis.
Studies on the Constituents of Aspidistra elatior BLUME. II. On the Steroidal Glycosides of the Leaves. (1)
Konishi, Tenji,Kiyosawa, Shu,Shoji, Junzo
, p. 1451 - 1460 (2007/10/02)
Six steroidal glycosides were isolated from the fresh leaves of Aspidistra elatior BLUME (Liliaceae) and the structures of these glycosides, tentatively named glycosides A(I), B(2), C(3), D(4), E(5) and F(6), were established to be neopentologenin 5-O-β-D-glucopyranoside (1), 26-O-β-D-glucopyranosyl 22-methoxy-5β-furostane-1β,3β,4β,5β,26-pentaol 5-O-β-D-glucopyranoside (2), aspidistrin (3), 26-O-β-D-glucopyranosyl 22-methoxy-5-β-furostane-1β,2β,3β,4β,5β,26-hexaol 5-O-β-D-glucopyranoside (4), methyl proto-aspidistrin (5) and magnesium 26-O-β-D-glucopyranosyl 22-methoxy-5β-furostane-1β,3β,4β,5β,26-pentahydroxy-2β-yl-sulfate monohydroxide (6), respectively.The last compound is the first sulfated steroidal glycoside to be isolated from a Liliaceous plant.Keywords - steroidal glycoside; Aspidistra elatior; Liliaceae; leaf; spirostanol glycoside; furostanol glycoside; sulfated steroidal glycoside; diosgenin; neopentologenin; aspidistrin.
