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Phytochemical examination of the tubers of Dichelostemma multiflorum led to the isolation of three new steroidal saponins together with two known saponins. The structures of the new compounds were determined by spectral data and a few chemical transformations to be (25R)-5α-spirostane-1β,3β-diol (brisbagenin) 1-O-{O-α-l-rhamnopyranosyl-(1 → 3)-4-O-acetyl-α-l-arabinopyranoside}, brisbagenin 1-O-{O-α-l-rhamnopyranosyl-(1...
The chemical compounds in the bulbs of Triteleia lactea have been analysed as a part of our systematic study of plants of the subfamily Allioideae in Liliaceae. Thirteen steroidal saponins, seven of which appeared to be new compounds, were isolated. The structures of the new saponins were elucidated on the basis of the spectroscopic analysis, including two-dimensional NMR techniques, and hydrolysis...
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