2415-24-9Relevant articles and documents
10-O-acylated iridoid glucosides from leaves of Premna subscandens
Sudo, Hirokazu,Ide, Toshinori,Otsuka, Hideaki,Hirata, Eiji,Takushi, Anki,Takeda, Yoshio
, p. 1231 - 1236 (1997)
From the 1-butanol-soluble fraction of a methanol extract of leaves of Premna subscandens, collected on Ishigaki Island, Okinawa, ten 10-O-acylated derivatives of catalpol and asystasioside E were isolated. The structures of nine new compounds were elucidated by spectroscopic methods and by chemical conversion.
Chlorinated iridoid glucosides from Veronica longifolia and their antioxidant activity
Jensen, Soren R.,Gotfredsen, Charlotte H.,Harput, U. Sebnem,Saracoglu, Iclal
, p. 1593 - 1596 (2010)
From Veronica longifolia were isolated three chlorinated iridoid glucosides, namely, asystasioside E (6) and its 6-O-esters 6a and 6b, named longifoliosides A and B, respectively. The structures of 6a and 6b were proved by analysis of their spectroscopic data and by conversion to the catalpol ester verproside (5a) or to catalpol (5), respectively. The configuration of the previously known vanilloyl analogue, urphoside B, was shown to be the 6β-epimer (6c) of the structure originally reported. Longifoliosides A (6a) and B (6b) were found to exhibit radical-scavenging activity against nitric oxide, superoxide, and 2,2-diphenyl-1-picrylhydrazyl radicals.
Isolation, semi-synthesis, docking-based prediction, and bioassay-based activity ofDolichandrone spathaceairidoids: new catalpol derivatives as glucosidase inhibitors
Phuong Thao, Tran Thi,Bui, Thanh Q.,Quy, Phan Tu,Bao, Nguyen Chi,Van Loc, Tran,Van Chien, Tran,Chi, Nguyen Linh,Van Tuan, Nguyen,Van Sung, Tran,Ai Nhung, Nguyen Thi
, p. 11959 - 11975 (2021)
Dolichandrone spathaceairidoids are promising anti-diabetic inhibitors towards α-glucosidase protein (PDB-) and oligo-1,6-glucosidase protein. Five catalpol iridoids(1,2,10,13,14)were isolated from mangrove plantD. spathacea, and their derivatives (3,4,5,6,7,8,9,11,12,15) were obtained from reduction, acetylation,O-alkylation, acetonisation, or hydrolysation starting from naturally isolated compounds. They were identified by spectral methods such as IR, MS, and 1D and 2D NMR. Their glucosidase-related (inhibitability and physiological compatibility were predicted by molecular docking simulation and prescreened based on Lipinski's rule of five. Experimental α-glucosidase inhibition of1-15was evaluated using enzyme assays. Compounds3,4,5,6, and9are new iridoid derivatives, introduced to the literature for the first time, while all fifteen compounds1-15are studied for molecular docking for the first time. Regarding protein, the five strongest predicted inhibitors assemble in the order2>10>1>9>14. In respect to, the corresponding order is14>2>10>5>1=9. Lipinski's criteria suggest10as the candidate with the most potential for oral administration. Thein vitrobioassay revealed that compound10is the most effective inhibitor with a respective IC50value of 0.05 μM, in the order10>2>14>13>1. The computational and experimental results show good consistency. The study opens an alternative approach for diabetes treatment based on inhibitability of natural and semi-synthesised catalpol iridoid derivatives towards carbohydrate-hydrolases.
Eremosides A-C, new iridoid glucosides from Eremostachys loasifolia
Ali, Bakhat,Mehmood, Rashad,Mughal, Uzma Rasheed,Malik, Abdul,Safder, Muhammad,Hussain, Riaz,Imran, Muhammad,Tareen, Rasool Bakhsh
experimental part, p. 586 - 593 (2012/05/20)
Eremosides A-C (1 - 3), three new iridoid glucosides, were isolated from the AcOEt-soluble fraction of the EtOH extract of the whole plant of Eremostachys loasifolia, along with buddlejoside B (4), 10-O-benzoylcatalpol (5), and pakiside A (6) reported for the first time from this species. The structures of these compounds were elucidated by spectroscopic data including 2D-NMR, FAB-MS, ESI-MS, as well as by acid and basic hydrolyses.
New glycosidic constituents of abutilon Pakistanicum
Ali, Bakhat,Fatima, Itrat,Malik, Abdul,Ahmed, Zaheer
experimental part, p. 2245 - 2250 (2011/01/12)
Pakisides A and B (1 and 2, resp.), new catalpol-type iridoid glycosides, and a new glycoside, 3, of scutellarein have been isolated from the AcOEt-soluble fraction of the whole plant of Abutilon pakistanicum, along with buddlejoside and lapachol. The structures of new compounds were elucidated by spectroscopic techniques including 1H-and 13C-NMR (DEPT), and 2D-NMR experiments. Copyright 2010 Verlag Helvetica Chimica Acta AG, Zuerich, Switzerland.
PHARMACEUTICAL COMPOSITION COMPRISING AN EXTRACT OF PSEUDOLYSIMACHION LONGIFOLIUM AND THE CATALPOL DERIVATIVES ISOLATED THEREFROM HAVING ANTIINFLAMMATORY, ANTIALLERGIC AND ANTIASTHMATIC ACTIVITY
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Page/Page column 13, (2008/06/13)
The present invention relates to a composition comprising an extract of Pseudolysimachion genus plant, and the catalpol derivatives isolated therefrom having anti-inflammatory, antiallergic and anti-asthmatic activity. The extractof Pseudolysimachion genus plantand the catalpol derivatives isolated therefrom shows potent suppressing effect on elevated IgE, IL-4 and IL- 13 levels and eosinophilia in the plasma and BALF, and mucus overproduction in the lung tissues in an OVA-induced asthmatic mouse model. Therefore, it can be used as the therapeutics or functional health food for treating and preventing inflammatory, allergic and asthmatic disease.
New iridoid glucoside from Picrorhiza kurroa Royle ex Benth
Mandal, Suparna,Mukhopadhyay, Sibabrata
, p. 1023 - 1025 (2007/10/03)
Picrorhiza kurroa Royle ex Benth, commonly known as kutki is used as a crude drug reported in Indian pharmacopoeia. Acetyl derivative of a new iridoid glucoside, picroside V (6-m-methoxybenzoyl catalpol) along with three known iridoid glucosides picroside I, picroside II and catalpol have been isolated from the roots of Picrorhiza kurroa Royle ex Benth.
Megastigmane, benzyl and phenethyl alcohol glycosides, and 4,4'- dimethoxy-β-truxinic acid catalpol diester from the leaves of Premna subscandens Merr.
Sudo, Hirokazu,Ide, Toshinori,Otsuka, Hideaki,Hirata, Eiji,Takushi, Anki,Shinzato, Takakazu,Takeda, Yoshio
, p. 542 - 546 (2007/10/03)
Extensive isolation work on the n-BuOH-soluble fraction obtained from the leaves of Premna subscandens, collected on Ishigaki island, Okinawa, afforded six compounds. Two were identified as megastigmane glucosides, 7- (3,5-dihydroxy-1,1,5-trimethylcyclohexylidene)-9-methylprop-8-enyl 9-O-β-D- glucopyranoside and 3-hydroxy-5,6-epoxy-β-ionol 9-O-β-D-glucopyranoside. The structures of the remaining four new compounds were elucidated to be a 2'-O-β-D-apiofuranosyl derivative of 3-hydroxy-5,6-epoxy-β-ionol 9-O-β-D- glucopyranoside, named premnaionoside, benzyl alcohol β-D-(2'-O-β-D- xylopyranosyl)glucopyranoside, phenethyl alcohol β-D-(2'-O-β-D- glucopyranosyl)glucopyranoside, and 4,4'-dimethoxy-β-truxinic acid catalpol diester by spectroscopic analyses.