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Alkaloidal content of four berberis species structure of berberilaurine a new bisbenzyltetrahydroisoquinoline

, : Alkaloidal content of four berberis species structure of berberilaurine a new bisbenzyltetrahydroisoquinoline. Journal of Natural Products (Lloydia) 52(1): 81-84

From Berberis boliviana, Berberis bumeliaefolia, Berberis laurina, and Berberis paucidentata, twenty-one isoquinoline alkaloids were isolated. B. laurina yielded a new compound, berberilaurine [1], a bisbenzyltetrahydroisoquinoline with two diarylether bridges in between C-7 to C-5 and C-11 to C12'.


DOI: 10.1021/np50061a010

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Andersson, O., 2007: Dielectric relaxation of low-density amorphous ice under pressure. In situ studies at high pressures show that the dielectric relaxation time tau of low-density amorphous (LDA) ice is more than an order of magnitude longer than that of high density amorphous ice. The increase in tau at the transformation to LDA i...

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Imai, Y., 1935: Variation in the Rate of Recurring Plastid Mutations in Hordeum Vulgare Caused by Differences in the Sowing Times. The result of sowing at intervals of ten days a pure line of variegated barley was considerable variation in the frequency of occurrence of albino seedlings. The variegation concerned is due to an exo-mutation of the plastids from green to white a...

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Vgenopoulus Andreas G., 1971: The fluorine content of some rock-building minerals of the Lepontine Alps. Abundances in amphiboles and micas (with tabulated data), analytic methods, correlation between coexisting muscovite-biotite and biotite-hornblende coexisting pairs, bibliography, Switzerland.

Zhi, Y.; Zhao, K.; Liu, Q.; Wang, A.; Enders, D., 2016: Asymmetric synthesis of functionalized trifluoromethyl-substituted pyrrolidines via an organocatalytic domino Michael/Mannich [3+2] cycloaddition. NlmCategory="UNASSIGNED">The asymmetric synthesis of highly functionalized pyrrolidine derivatives with three contiguous stereogenic centers and bearing a trifluoromethyl group has been developed through an organocatalytic domino Mich...

Uozumi, M.; Hayashikawa, R.; Piette, L.H., 1967: ESR and crystallization studies of iron-free xanthine oxidase. Low iron-containing xanthine oxidase (0.3 mole iron/mole protein) was crystallized. The physical features of these crystals are quite different from those obtained from native enzyme (8 moles/Fe/mole protein). Upon removal of iron from the enzyme,...

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