Studies on leguminous plants. Part XXXIV. Six New Triterpenoidal Glycosides Including Two New Sapogenols from Albizziae Cortex. V.

Phenolic Glycosides from the Stem Bark of Albizzia julibrissin

“…1) Earlier phytochemical investigations on this species resulted in the isolation of saponins, [2][3][4][5] lignans, [6][7][8] phenolic glycosides, 6) triterpenes, 9) flavonoids and others. [10][11][12][13][14][15] Previously, we reported that the methanolic extract of the stem bark of A. julibrissin exerts an radical scavenging activity on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.…”

Hepatoprotective Triterpenoid Saponins from <i>Callicarpa nudiflora</i>

“…Acid hydrolysis of 1 with 2 M HCl afforded D-glucose, which was identified by GC analysis of its trimethylsilyl L-cysteine derivatives. 10) In the HMBC spectrum of 1, the presence of correlations from Glc-H-1 (δ H 6.38) to C-28 (δ C 177.7) confirmed that the glucose unit is located at C-28 of the aglycone. The α-orientation of 2-OH, 3-OH, and 19-OH in 1 was deduced by analysis of the nuclear Overhauser effect spectroscopy (NOESY) spectrum which showed nuclear Overhauser effect (NOE) correlations between the following proton pairs: H-2/H-3, H-2/H-24, H-2/H-25, and H-19/H-30.…”

“…Compound 10) In the HMBC spectrum of 4, a long-range correlation from Glc-H-1 (δ H 5.40) to C-28 (δ C 177.7) confirmed that the β-D-glucopyranosyl unit is attached to C-28. In the NOESY spectrum, NOE correlations were observed between the following proton pairs: H-2/H-24, H-2/H-3, H-2/H-25, indicating that hydroxyl group at C-2, C-3, and C-23 were all oriented to α position.…”

Genetic fidelity assessment of in vitro-regenerated plants of Albizia julibrissin using SCoT and IRAP fingerprinting

“…Active natural products of great pharmaceutical interest include triterpenoid saponins (Kinjo et al 1992;Liang et al 2005;Han et al 2011), phenolic glycosides (Jung et al 2004), and flavonoids (Lau et al 2007). It has been reported that two secondary metabolites from the tree pods have the potential to act as biocides and antioxidants (Lv et al 2011).…”