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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Phytochemistry, 1991 , 30 (11) :3785-3792.
Alkaloids from leaves and root bark ofErvatamia hirta.[Reference:
WebLink]
METHODS AND RESULTS:
During chemical investigation of the leaves and root bark ofErvatamia hirta, 33 alkaloids were isolated. Seven are new: six are the ‘monomeric’ alkaloids (E) 16-epi-normacusineB, (E) 16-epi-affinisine,O-acetyl-16-epi-affinisine, affinisine-N(4)-oxide, dehydro-16-epi-affinisine, norfluorocurarine-N(4)-oxide, and the seventh is the bisindole 16-decarbomethoxyvoacamine-pseudoindoxyl. The known alkaloids are: (E) 16-epi-isositsirikine, β-yohimbine, yohimbine, 19,20-dehydro-β-yohimbine, β-yohimbine-pseudoindoxyl, isositsirikine, 19,20-dihydroisositsirikine, β-yohimbine-oxindole, normacusineB, affinisine, vobasine, dregamine, tabernaemontanine, norfluorocurarine, 12-hydroxynorfluorocurarine, apparicine, 3,14-dihydroellipticine, antirhine, voacristine, ibogaine, i☐ygaine, i☐ygaine-hydroxyindolenine, iboluteine, 4′,17,(17β)-dihydrotchibangensine, 16-decarbomethoxyvoacamine and 19,20-dihydro-16-decarbomethoxyvoacamine.
CONCLUSIONS:
Structural elucidation of the new alkaloids is based on spectral data and chemical correlations.
