Bioactive Saponins and Glycosides. XVII. Inhibitory Effect on Gastric Emptying and Accelerating Effect on Gastrointestinal Transit of Tea Saponins: Structures of Assamsaponins F,G,H,I, and J from the Seeds and Leaves of the Tea Plant.

Medicinal Flowers. XXVI. Structures of Acylated Oleanane-Type Triterpene Oligoglycosides, Yuchasaponins A, B, C, and D, from the Flower Buds of <i>Camellia oleifera</i>&mdash;Gastroprotective, Aldose Reductase Inhibitory, and Radical Scavenging Effects&mdash;

“…yuchasaponin A was determined to be 21 34) and tiglic acid, which was identified by HPLC. [26][27][28] Acid hydrolysis of 2a with 5% aqueous H 2 SO 4 in 1,4-dioxane [1 : 1 (v/v)] liberated barringtogenol C (2b) 35) and four mucosaccharides (D-galactose, Dglucose, D-glucuronic acid, and L-rhamnose), which were identified by GLC. [30][31][32] The 1 H-(pyridine-d 5 ) and 13 C-NMR (Table 5) …”

“…Alkaline hydrolysis of 3, and 4 furnished desacyl-derivatives (3a, 4a) and tiglic acid, which was identified by HPLC. [26][27][28] On the acid hydrolysis, 3a and 4a liberated 1b (from 3a) and 2b (from 4a) together with D-galactose, D-glucuronic acid, and L-rhamnose, which were identified by GLC. [30][31][32] The 1 H-(pyridined 5 ) and 13 C-NMR (Table 5) Next, we examined the gastroprotective effects of the principal constituents (6, 7, 8, gallic acid) from the flower buds of C. oleifera and the flavonoid constituents (6, 7) were found to show moderate activities as shown in Table 6.…”

Quantitative Analysis of Saponins in a Tea-Leaf Extract and Their Antihypercholesterolemic Activity

“…In green tea leaves, several saponins such as theasaponin B 1 , 1) assamsaponin J, 2) isotheasaponin B 1 -B 3 , 3) foliatheasaponin I-V, 4) and floratheasaponin A 4) have already been identified. In pharmacological studies on tea-leaf saponins, neutrophil-stimulating, 5) antimicrobial, 6) anti-inflammatory, 6) antihypertensive, 7) and anti-allergic 8) effects have been reported.…”

“…[1][2][3][4] We considered that the fragment peak of theasapogenol B measured by LC/TOF-MS could be used to identify the saponins and that the absorption at 280 nm of the cinnamoyl group measured by LC/UV could be used to quantify them.…”

Molluscicidal activity of Camellia oleifera seed meal

“…The isolated fraction D4 was identified by comparison of its physical data with the reported values [16][17][18][19][20][21][22][23][24] . The saponin compounds in Camellia spp.…”