ChemInform Abstract: Two New Flavonol Glycosides from Leaves of Koelreuteria paniculata.

Abstract

Two New Flavonol Glycosides from Leaves of Koelreuteria paniculata.-Compounds (I) and (II) are isolated from dried leaves of Koelreuteria paniculata along with 9 known polyphenolic metabolites. -(MAHMOUD, I.; MOHARRAM, F. A.; MARZOUK, M. S.; SOLIMAN, H. S. M.; EL-DIB, R. A.; Pharmazie 56 (2001) 7, 580-582; Dep. Tanning and Protein

Golden rain tree leaf extracts as potential inhibitor of lipid peroxidation and 4-nitroquinoline-1-oxide (4-NQO)-induced DNA damage

“…In our studies, all the extract/fraction showed more or less DNA protective activity at the highest concentration tested (250 µg/ml) against the DNA damage induced by 4-NQO except the KCF which showed very less protection only at the highest con- centration (Figures 2, 3, 4, 5 and 6). Phenolics reported by earlier workers (Mahmoud et al, 2001;Lin et al, 2002) may in part contribute to DNA protective activity. Further, we already evaluated these extract/fractions for DNA protective activity against hydroxyl radical mediated DNA damage (Kumar et al, 2011a,b).…”

“…KEF was found to be most effective among all extract/fractions. A number of polyphenolic compounds from leaves of K. paniculata have been reported including 3''-O-galloyl-4'-O-galloyl-4-O-galloyl-gallic acid, ethyl pheptagallate, 3''-galloylquercitrin, catechin, galloylepicatechin, isorhamnetin, kaempferol-3-O-arabinopyranoside, quercitrin, methyl p-digallate, methyl m-digallate, p-digalloyl acid, m-digalloyl acid, hyperin, kaempferol-3-O-alpha-L-rhamnoside, 6,8-dihydroxy-afzelin, afzelin 3"-O-gallate and quercetin-3'-O-beta-D-arabinopyranoside (Mahmoud et al, 2001;Lin et al, 2002). Earlier, we had reported that chloroform, ethyl acetate, n-butanol and aqueous fractions of K. paniculata are rich in phenolic and flavonoid compounds and have shown free radical scavenging activity in different in vitro assays viz DPPH assay, Reducing Power assay, Superoxide radical scavenging assay, ABTS cation radical scavenging assay (Kumar et al, 2011a, b).…”

Effects of <i>Syzygium cumini</i> Seed Extract on the Memory Loss of Alzheimer’s Disease Model Rats

“…The genus Syzygium is one of the genera of the myrtle family Myrtaceae. Plants of this family have a rich history of uses both as edibles and as traditional medicines in divergent ethnobotanical practices throughout the tropical and subtropical world [24] [25]. The plants have beneficial effects on digestive disorders, diuresis [26], enteric disorders [27] and diarrhoea [28].…”

New triterpenoidal saponins from Koelreuteria paniculata

“…Recent reports showed that the crude extracts of this plant possessed antitumor and antioxidant activities. The isolation of a gallate derivatives, cyanolipids and flavonoids have been reported (Mahmoud et al, 2001; Seigler and Butterfield, 1976; Yang et al, 1999). The present work reports the isolation and identification of three new compounds, including a tridesmosidic saponin 1 named Paniculatosoid A and two monodesmosidic saponins 2 and 3 named Paniculatosoid B and C, along with eleven known compounds 4-14 identified as 5- O -methyl-luteolin 4 , loliolide 5 , kaempferol 7- O -α- l -rhamnoside 6 , kaempferol-3- O -α- l -rhamnoside 7 , methyl myo-inositol 8 , β-sitosterol 9 , β-sitosterol-β- d -glucoside 10 , palmitic acid monoglyceride 11 , ethyl gallate 12 , methyl gallate 13 and gallic acid 14 .…”