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Two new spirostanol saponins, namely elephanosides G and H (1 and 2, resp.) were isolated from the leaves of Yucca elephantipes (Agavaceae), together with the two known furostanol saponins 3 and 4 and the six known flavonoid O‐ and C‐glycosides 5–10. The new structures were elucidated as (3β,25S)‐spirost‐5‐en‐3‐yl O‐β‐D‐glucopyranosyl‐(1→3)‐O‐β‐D‐glucopyranosyl‐(1→4)‐β‐D‐galactopyranoside (1) and...
Ten steroidal saponins with cis-fused A/B ring, including a smilagenin glycoside, elephanoside A (4), and the five furostanol bisdesmosides, elephanosides B–F (6–10), were isolated from the stems of Yucca elephantipes Regel. (Agavaceae). Their structures were determined by detailed chemical and spectroscopic analysis. All the isolated compounds were tested for their in vitro antifungal and antibacterial...
Atropurosides A–G (1–7), seven new steroidal saponins, which possess new polyhydroxylated aglycones, were isolated from the rhizomes of Smilacina atropurpurea (Convallariaceae), together with a known saponin, dioscin (8). Their structures were elucidated on the basis of detailed spectroscopic analysis, including 1D and 2D NMR techniques and chemical methods. Antifungal testing of the eight compounds...
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...
A further phytochemical investigation on the fresh stem of Dracaena cochinchinensis yielded 18 steroidal saponins. Fourteen of which are new compounds, designated as 25(R,S)-dracaenosides E-H, M, O-Q, dracaenosides I-L, R, and 25(S)-dracaenoside N. Their structures were determined by detailed spectroscopic analysis, including extensive 1D and 2D NMR data, and the result of hydrolytic reaction.
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