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. 2002 Apr;59(7):739-47.
doi: 10.1016/s0031-9422(02)00035-3.

Pyrano-isoflavones with erectile-dysfunction activity from Eriosema kraussianum

Siegfried E Drewes  1 , Marion M Horn, Orde Q Munro, Jabu T B Dhlamini, J J Marion Meyer, N Christopher Rakuambo
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Pyrano-isoflavones with erectile-dysfunction activity from Eriosema kraussianum

Siegfried E Drewes et al. Phytochemistry. 2002 Apr.

Abstract

Five pyrano-isoflavones have been isolated from the rootstock of Eriosema kraussianum N. E. Br (Papilionaceae). Spectral data and single crystal X-ray analyses were used for structural elucidation. The most active of the compounds had an activity of 75% of that found in Viagra in the erectile dysfunction test on rabbit penile smooth muscle.

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