Teuvincenone H
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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Magnetic Resonance in Chemistry, 2003, 41(9):731-734.
1H and 13C NMR assignments of abietane diterpenes from Aegiphila lhotzkyana.[Reference:
WebLink]
METHODS AND RESULTS:
An NMR study of one new and several known abietane diterpenes isolated from the roots of Aegiphila lhotzkyana is described. In addition to 1D NMR, several 2D shift-correlated NMR pulse sequences (1H–1H-COSY, NOESY, HMQC and HMBC) were used to establish all the structures, and unambiguously perform the 1H and 13C chemical shift assignments of the new natural diterpene and three derivatives, the NMR data for which have not been reported previously. Revision of current data assignment for Teuvincenone H is also suggested.
Phytochemistry, 1992, 31(5):1697-1701.
Rearranged abietane diterpenoids from the root of two Teucrium species.[Reference:
WebLink]
METHODS AND RESULTS:
From the root of Teucrium fruticans, two new rearranged abietane diterpenoids, teuvincenones F and G, have been isolated together with the known diterpene teuvincenone E. The acetone extract of the root of T. polium subsp. expansum yielded three previously known compounds (ferruginol and teuvincenones A and B) and two new 17(15 → 16)-abeo-abietane derivatives (teuvincenones H and I).
CONCLUSIONS:
The structures of the new diterpenoids [12,16-epoxy-11,14-dihydroxy-17(15 → 16), 18(4 → 3)-diabeo-abieta-3,5,8,11,13,15-hexaene-2,7-dione (teuvincenone F), (16S)-12,16-epoxy-11,14-dihydroxy-17(15 → 16)-abeo-abieta-8,11,13-triene-3,7-dione (teuvincenone G), 12,16-epoxy-6,11,14-trihydroxy-17(15 → 16)-abeo-abieta-5,8,11,13,15-pentaene-3,7-dione (Teuvincenone H) and 12,16-epoxy-6-hydroxy-17(15 → 16)-abeo-abieta-5,8,12,15-tetraene-3,7,11,14-tetraone (teuvincenone I)] were established by spectroscopic means and by comparison with closely related compounds.
