New flavonoids from the stem bark of Erythrina caffra Thunb.

Desta ZY, Sewald N, Majinda RRT (2014)
Natural Product Research 28(9): 667-673.

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Abstract
Three new flavonoids 5,7-dihydroxy-2 ',4 '-dimethoxy-5 '-formylisoflavanone (erycaffra E) (1), 5,7-dihydroxy-3 '-(2 ''-hydroxy-3 ''-methylbut-3-enyl)-5 '-(3"'-hydroxy-3"'-methyl-trans-but-1-enyl)-4 '-methoxyflavanone (erycaffra D) (2) and 5,7-dihydroxy-4 '-methoxy-3 ',5 '-di-(3 ''-hydroxy-3 ''-methyl-trans-but-1-enyl)flavanone (erycaffra F) (3) were isolated from the stem bark of Erythrina caffra along with four known compounds, namely 5,4 '-dihydroxy-6-(3 ''-methylbut-2 ''-enyl)-5"'-hydroxyisopropyldihydrofurano[2"',3"':7,8]isoflavone (isosenegalensein) (4), 5,7-dihydroxy-4 '-methoxy-3 '-(3 ''-methylbut-2-enyl)-5 '-(3"'-hydroxy-3"'-methylbut-1-enyl)flavanone (burttinone) (5), 5,4 '-dihydroxy-5 ''-hydroxyisopropyldihydrofurano[2"',3"':7,6]isoflavone (erythrinin C) (6) and 5,4 '-dihydroxy-6 ''-hydroxymethyl-6 ''-methylpyrano[2 '',3 '':6,7]isoflavone (erysubin B) (7). The structures were determined on the basis of spectroscopic data (1D, 2D NMR and MS) and by comparison with literature values.
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Desta ZY, Sewald N, Majinda RRT. New flavonoids from the stem bark of Erythrina caffra Thunb. Natural Product Research. 2014;28(9):667-673.
Desta, Z. Y., Sewald, N., & Majinda, R. R. T. (2014). New flavonoids from the stem bark of Erythrina caffra Thunb. Natural Product Research, 28(9), 667-673.
Desta, Z. Y., Sewald, N., and Majinda, R. R. T. (2014). New flavonoids from the stem bark of Erythrina caffra Thunb. Natural Product Research 28, 667-673.
Desta, Z.Y., Sewald, N., & Majinda, R.R.T., 2014. New flavonoids from the stem bark of Erythrina caffra Thunb. Natural Product Research, 28(9), p 667-673.
Z.Y. Desta, N. Sewald, and R.R.T. Majinda, “New flavonoids from the stem bark of Erythrina caffra Thunb.”, Natural Product Research, vol. 28, 2014, pp. 667-673.
Desta, Z.Y., Sewald, N., Majinda, R.R.T.: New flavonoids from the stem bark of Erythrina caffra Thunb. Natural Product Research. 28, 667-673 (2014).
Desta, Zelalem Yibralign, Sewald, Norbert, and Majinda, Runner R. T. “New flavonoids from the stem bark of Erythrina caffra Thunb.”. Natural Product Research 28.9 (2014): 667-673.
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Bedane KG, Kusari S, Eckelmann D, Masesane IB, Spiteller M, Majinda RR., Fitoterapia 105(), 2015
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