Saponins from the seeds of Achras sapota.
A new pentacyclic triterpenoid saponin (2) along with one known was isolated from the cotyledons of Achras sapota. Their structures were determined with the help of (1)H NMR, (13)C NMR and MS spectral data. The isolated compounds were named as 3-O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl-28-O-alpha-L-rhamnopyranosyl-(1-->3)-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranosyl protobassic acid (1) and 3-O-beta-D-glucopyranosyl-(1-->3)-beta-D-glucopyranosyl-28-O-alpha-L-rhamnopyranosyl-(1-->3)-beta-D-xylopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-(1-->2)-alpha-L-arabinopyranosyl-16alpha-hydroxy protobassic acid (2). Compound 2 showed antibacterial activity against Gram positive and negative bacteria.
Department of Chemistry, Faculty of Science, University of Karachi, Karachi, Pakistan. rehanaifzal@gmail.com
Rehana
R
Ahmed
Fahima
F
Rashid
Viqar Uddin
VU
Ahmed
Faryal Vali
FV
Mohammad
Mushtaq
M
Noorwala
Nazia
N
Bibi
Shahana Urooj
SU
Kazmi
D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry*; D029632:Sapotaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
C530935:3-O-beta-D-glucopyranosyl-(1-3)-beta-D-glucopyranosyl-28-O-alpha-L-rhamnopyranosyl-(1-3)-beta-D-xylopyranosyl-(1-4)-alpha-L-rhamnopyranosyl-(1-2)-alpha-L-arabinopyranosyl-16alpha-hydroxy protobassic acid; C530936:3-O-beta-D-glucopyranosyl-(1-6)-beta-D-glucopyranosyl-28-O-alpha-L-rhamnopyranosyl-(1-3)-beta-D-xylopyranosyl-(1-4)-alpha-L-rhamnopyranosyl-(1-2)-alpha-L-arabinopyranosyl protobassic acid; D012503:Saponins; D014315:Triterpenes