1. Two New Steroidal Saponins from the Fresh Leaves of Agave sisalana
- Author
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Jing Fu, Xu Pang, Yang Zhao, Da-Wei Tan, Li-Ping Kang, Xin-Bo Song, Peng Zou, Li-Juan Zhang, Cheng-Qi Xiong, Bai-Ping Ma, Jie Zhang, Yi-Xun Liu, and He-Shui Yu
- Subjects
chemistry.chemical_classification ,biology ,Stereochemistry ,Organic Chemistry ,Saponin ,Furostanol saponin ,Agave ,biology.organism_classification ,Biochemistry ,Catalysis ,Inorganic Chemistry ,chemistry ,Drug Discovery ,Organic chemistry ,Physical and Theoretical Chemistry - Abstract
A new furostanol saponin, sisalasaponin C (1), and a new spirostanol saponin, sisalasaponin D (2), were isolated from the fresh leaves of Agave sisalana, along with three other known steroidal saponins and two stilbenes. Their structures were identified as (3β,5α,6α,22α,25R)-3,26-bis[(β-D-glucopyrano- syl)oxy]-22-hydroxyfurostan-6-yl β-D-glucopyranoside (1), (3β,5α,25R)-12-oxospirostan-3-yl 6-deoxy-α-L-mannopyranosyl-(14)-β-D-glucopyranosyl-(13)-[β-D-xylopyranosyl-(13)-β-D-glucopyranosyl-(12)]-β-D-glucopyranosyl-(14)-β-D-galactopyranoside (2), (3β,5α,6α,22α,25R)-22-methoxyfurostane-3,6,26-triyl tris-β-D-glucopyranoside, cantalasaponin-1, polianthoside D, (E)- and (Z)-2,3,4′,5-tetrahydroxystilbene 2-O-β-D-glucopyranosides. The last three known compounds were isolated from the fresh leaves of Agavaceae for the first time. The structures of the new compounds were elucidated by detailed spectroscopic analysis, including 1D- and 2D-NMR experiments, and chemical techniques.
- Published
- 2011