Steroidal glycosides from Agave cantala

• Published in: Phytochemistry (Oxford) Vol. 29; no. 3; pp. 937 - 940
• Main Authors: Uniyal, G.C., Agrawal, P.K., Thakur, R.S., Sati, O.P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 1990; Elsevier
• Subjects: Agavaceae; Agave cantala; agaveside A; agaveside B; Analytical, structural and metabolic biochemistry; Biological and medical sciences; Biotechnology; Carbohydrate Conformation; Carbohydrate Sequence; fruit; Fundamental and applied biological sciences. Psychology; Glycosides - isolation & purification; Magnetic Resonance Spectroscopy; Molecular Sequence Data; Other biological molecules; Plants, Medicinal; Spirostans - isolation & purification; steroidal glycosides; Terpenes, steroids. Hormones; Agavaceae; Agave cantala; agaveside A; agaveside B; fruit; steroidal glycosides; Characterization; Steroid; Monocotyledones; Molecular structure; Angiospermae; Isolation; Spermatophyta; Glycoside; NMR spectrometry; Mass spectrometry; Saponin
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/0031-9422(90)80050-Q

Two new steroidal glycosides, agaveside A and B, isolated from the fruits of Agave cantala were characterized as 3β- O-{β- d-xylopyranosyl-(1→2),β- d-xylopyranosyl-(1→3),β- d-glucopyranosyl-(1→3)-[β- d-xylopyranosyl-(1→3)-β- d-galactopyranosyl-(1→2)]-β- d-glucopyranosyl}-(25 R)-5α-spirostane and 3β- O-{β- d-xylopyranosyl-(1→2),β- d-xylopyranosyl-(1→3)-β- d-glucopyranosyl-(1→3)-[β- d-galactopyranosyl-(1→2)]-β- d-glucopyranosyl}-(25 R)-5α-spirostane. The structures were elucidated by a combination of 13C NMR spectroscopy, chemical degradation and fast atom bombardment mass spectrometry.