Daturataturin A
Reference standards.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Steroids. 2014 Sep;87:26-34.
New anti-inflammatory withanolides from the leaves of Datura metel L.[Pubmed:
24844203]
METHODS AND RESULTS:
Nine new withanolides, named daturafolisides A-I (1-9), along with six known compounds (22R)-27-hydroxy-7α-methoxy-1-oxowitha-3,5,24-trienolide-27-O-β-d-glucopyranoside, Daturataturin A, daturametelin J, daturataurin B, baimantuoluoside B, 12-deoxywithastramonolide (10-15), were isolated from the leaves of Datura metel L. The structures and absolute stereochemistry of these compounds were elucidated by means of spectroscopic methods including 1D and 2D NMR techniques, mass spectrometry and circular dichroism (CD) analyses. All isolates were evaluated for in vitro anti-inflammatory potential using LPS-stimulated RAW 264.7 murine macrophages.
CONCLUSIONS:
Among them, compounds 1, 2, 14, and 15 exhibited significant inhibition of nitrite production with values of IC50 at 20.9, 17.7, 17.8, and 18.4μM. Compounds 3, 4, 6, and 13 presented moderate inhibitory activities with values of IC50 at 59.0, 52.8, 71.2, and 53.1μM, while the rest compounds displayed weak suppressive effect.
Chem Biodivers. 2006 Feb;3(2):180-6.
Daturametelins H, I, and J: three new withanolide glycosides from Datura metel L.[Pubmed:
17193256]
METHODS AND RESULTS:
Three new withanolide glycosides named daturametelins H-J (1-3), together with two known ones, Daturataturin A (4) and 7,27-dihydroxy-1-oxowitha-2,5,24-trienolide (5), were isolated from the MeOH extract of the aerial parts of Datura metel L. (Solanaceae). Their structures were determined mainly by spectroscopic techniques including 2D-NMR (HMBC, HMQC, (1)H,(1)H-COSY, NOESY) and MS experiments. Compounds 1-5 were tested for their antiproliferative activity towards the human colorectal carcinoma (HCT-116) cell line.
CONCLUSIONS:
The nonglycosidic compound 5 exhibited the highest activity of the tested withanolides, with an IC(50) value of 3.2+/-0.2 microM (Table 3).
