18546-13-9

Upstream product

• 67-56-1 methanol 
• 124-41-4 sodium methylate 
• 54943-65-6 methyl 3,4-anhydro-6-deoxy-α-L-talopyranoside 
• 38791-27-4 6-deoxy-1,2-O-isopropylidene-3-O-methyl-α-D-glucofuranose 
• 1129992-63-7 3-O-β-D-glucopyranosyl-(1->4)-β-D-thevetopyranosyl-(1->4)-β-D-oleandropyranosyl-(1->4)-β-D-cymaropyranosyl-(1->4)-β-D-digitoxopyranosyl-12-O-benzoyl-dihydrosarcostin 
• 1417887-96-7 stauntogenin B 3-O-α-L-cymaropyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-thevetopyranoside 
• 1417887-93-4 stauntogenin 3-O-α-L-diginopyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-thevetopyranoside 
• 1417887-95-6 stauntogenin A 3-O-α-L-diginopyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-cymaropyranosoyl-(1→4)-β-D-thevetopyranoside 
• 595-21-1 strospeside 
• 7647-01-0 hydrogenchloride 
• 7732-18-5 water 
• 67-64-1 acetone 
• 1395707-76-2 C₃₅H₆₀O₁₇ 
• 77369-84-7 5α-pregn-6-ene-3β,17α,20(S)-triol-3-O-β-D-digitalopyranoside 

Downstream Products

• 112047-81-1 O³-methyl-L-xylo-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-D-arabino-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-D-lyxo-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-L-lyxo-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-D-ribo-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-L-arabino-6-deoxy-[2]hexosulose-bis-phenylhydrazone 
• 112047-81-1 O³-methyl-D-xylo-6-deoxy-[2]hexosulose-bis-phenylhydrazone 

Relevant academic research and scientific papers

Cardenolide and Steroid Glycosides from Alafia sp., an Antimalarial Plant from Madagascar

New cardenolide glycoside 1 and steroid glycoside 2, named respectively corotoxigenin-3-O-β- digitalopyranosyl-(1–4)-O-β-digitoxopyanoside and 5?-pregnene-3β,16α,20(S)-diol 20-O-[β-Ddigitalopyranosyl (1→2)-β-D-glucopyranoside], have been isolated from the

A novel low-molecular-mass pumpkin polysaccharide: Structural characterization, antioxidant activity, and hypoglycemic potential

The novel natural low-molecular-mass polysaccharide (SLWPP-3) from pumpkin (Cucurbia moschata) was separated from the waste supernatant after macromolecular polysaccharide production and purified using a DEAE cellulose-52 column and gel-filtration chromatography. Chemical and instrumental studies revealed that SLWPP-3 with a molecular mass of 3.5 kDa was composed of rhamnose, glucose, arabinose, galactose and uronic acid with a weight ratio of 1: 1: 4: 6: 15, and primarily contained →3,6)-β-D-Galp-(1→, →4)-α-GalpA-(1→(OMe), →4)-α-GalpA-(1→, →2,4)-α-D-Rhap-(1→, →3)-β-D-Galp-(1→, →4)-α-D-Glcp, and →4)-β-D-Galp residues in the backbone. The branch chain passes were connected to the main chain through the O-4 atom of glucose and O-3 atom of arabinose. Physiologically, the ability of SLWPP-3 to inhibit carbohydrate-digesting enzymes and DPPH and ABTS radicals, as well as protect pancreatic β cells from oxidative damage by decreasing MDA levels and increasing SOD activities, was confirmed. The findings elucidated the structural types of pumpkin polysaccharides and revealed a potential adjuvant natural product with hypoglycemic effects.

Four new pregnane glycosides from Gymnema latifolium and their α-glucosidase and α-amylase inhibitory activities

Four new pregnane glycosides, gymlatifosides A - D (1 ? 4) and one known pregnane glycoside, verticilloside J (5) were isolated from the leaves of Gymnema latifolium Wall. ex Wight. Their chemical structures were elucidated on the basis of extensive spectroscopic methods, including 1D, 2D NMR, HR-ESI-MS, and in comparison with the reported data. All these compounds were tested for α-glucosidase and α-amylase inhibitory activities. Compound 5 exhibited the most anti α-glucosidase activity with inhibitory percentage of 37.8 ± 1.5% at the concentration of 200 μM. Compounds 1–4 showed moderate anti α-glucosidase activity with inhibitory percentage ranging from 7.0 to 30.1%. In addition, all compounds 1–5 showed moderate/weak anti α-amylase activity in the investigated test.

Pregnane glycosides from Gymnema inodorum and their α-glucosidase inhibitory activity

Two new pregnane glycosides, gyminosides A and B (1 and 2) and three known, tinctoroside B (3), tinctoroside C (4), and gymnepregoside F (5) were isolated from the leaves of Gymnema inodorum (Lour.) Decne. Their structures were elucidated by physical and chemical methods and comparing with those reported in the literature. All these compounds were evaluated for α-glucosidase assay. Compound 5 exhibited the most anti α-glucosidase activity with inhibitory percentage of 63.7 ± 3.9% at the concentration of 200 μM. Compounds 1–4 showed moderate anti α-glucosidase activity with inhibitory percentage ranging from 40.0 to 52.1%.

Five new pregnane glycosides from Gymnema sylvestre and their α-glucosidase and &alphla;-amylase inhibitory activities

Gymnema sylvestre, a medicinal plant, has been used in Indian ayurvedic traditional medicine for the treatment of diabetes. Phytochemical investigation of Gymnema sylvestre led to the isolation of five new pregnane glycosides, gymsylosides A-E (1-5) and four known oleanane saponins, 3β-O-β-D-glucopyranosyl (1→6)-β-D-glucopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl ester (6), gymnemoside-W1 (7), 3β-O-β-D-xylopyranosyl-(1→6)-β-Dglucopyranosyl-(1→6)-β-D-glucopyranosyl oleanolic acid 28-O-β-D-glucopyranosyl ester (8), and alternoside XIX (9). Their structures were identified based on spectroscopic evidence and comparison with those reported in the literature. All compounds were evaluated for their α-glucosidase and α-amylase inhibitory activities. Compounds 2-4 showed significant α-amylase inhibitory activity, with IC50 values ranging from 113.0 to 176.2 μM.

Pregnane glycosides from Dregea volubilis and their α-glucosidase inhibitory activity

Three new pregnane glycosides namely volubilosides D-F (1–3) along with three known, dregeoside Da1 (4), volubiloside A (5), and drevoluoside N (6) were isolated from the methanol extract of the leaves of Dregea volubilis using combined chromatographic methods. Their structures were elucidated by 1D-, 2D-NMR, and HR-ESI-MS spectra and comparing with those reported in the literature. Compounds 5 and 6 showed the most significant α-glucosidase inhibitory activity at the concentration of 40 μM with inhibition of 51.3 ± 3.2% and 50.4 ± 3.1%, respectively, compared to acarbose (59.8 ± 1.6%).

New calogenin pregnane glycoside derivative from Huernia saudi- arabica and its Lipase and α-Glucosidase Inhibitory Activities

As ongoing investigation of Huernia saudi-arabica D.V.Field (Asclepiadaceae), a new steroidal pregnane glycoside (Huernioside A) was isolated from dichloromethane fraction (DCM); it was identified as 3β, 11, 14β, 20(R)-tetrahydroxy-pregna-5,9(11)-diene-3-O-β-D-thevetopyranosyl-(1-4)-β-D-cymaropyranoside(HCP) through analysis of 1D, 2D NMR besides ESI-MS data. The alcoholic extract of the aerial part (ALE), DCM and HCP showed inhibitory potential against pancreatic lipase compared to orilstat. Among the tested samples, the ALE and HCP exhibited a promising pancreatic lipase inhibitory commotion through IC50 values of 0.61 ± 0.15, 1.23 ± 0.07 mg/ml (equivalent to 88.8 μM), respectively. HCP was prevailed to have a mixed mode of inhibition as exposed by enzyme kinetic studies. Hydrophobic interactions were the major forces involved in ligand enzyme interactions. In contrast, moderate α-glucosidase inhibitory activities were evidenced for ALE and HCP (% inhibition: 24.8 ± 1.8 and 26.6 ± 2.5, respectively) compared to acarbose. This investigation is the first to report on the possible in vitro anti-obesity and anti-diabetic impact of H. saudi-arabica.

Melanogenesis inhibitory pregnane glycosides from Cynanchum atratum

Bioassay-guided fractionation of the methanolic extract from the roots of Cynanchum atratum has resulted in the isolation of three new pregnane glycosides (1–3) along with four known compounds (4–7). Their structures were identified by analysis of the spectroscopic data including extensive 2D NMR. All of the isolates were evaluated for their potential to inhibit the melanin production in α-melanocyte stimulating hormone (α-MSH)-activated B16 melanoma cells. Of these, compounds 4–7 dose-dependently inhibited the melanin production with the IC50 values ranging from 4 μM to 33 μM.

Two new 14, 15-secopregnane-type steroidal glycosides from the roots of Cynanchum limprichtii

Two new steroidal glycosides 1 and 2, along with three known ones (3–5), were isolated from the 95% ethanol extract of the roots of Cynanchum limprichtii Schltr. The structure of the new compounds was elucidated as 3-O-α-L-diginopyranosyl-(1→4)-β-D-digito

New C21 steroidal glycosides from the roots of Cynanchum stauntonii and their protective effects on hypoxia/reoxygenation induced cardiomyocyte injury

Phytochemical investigations from the roots of Cynanchum stauntonii led to obtain four new C21 steroidal glycosides (1–4) and one known compound stauntoside F (5). Their chemical structures were characterized by sophisticated analyses of IR, HR