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10.Oliver, C., Bedoya, L.M., A.A, Osorio. et all, Isolation Structural Modification, and HIV Inhibition of Pentacyclic Lupane-Type Triterpenoids from Cassine xylocarpa and Maytenus cuzcoina, Journal Natural Products, 78 (5), pp 1045–1055. 2015.

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12.Nes, W. D. Biosynthesis of Cholesterol and Other Sterols. Chemical Reviews. 111, 6423-6451. 2011.

13.Wong, N.C. The beneficial effects of plant sterols on serum colesterol. Canadian Journal Cardiol., 17, 715-721, 2001.

14.Berges, R.R., Windeler, j. Trampisch, H.J. Senge, t and the ß-sitosterol study group. Randimized, placebo-controlled, doublé-blind clinical trial of ß-sitosterol in patients with benign prostatic hyperplasia. Lancet. 345, 1529-1532, 1995.

Agradecimientos: La Universidad de El Salvador, Ana Estévez Braun Profesora del Departamento Química Orgánica, Universidad de La Laguna, Tenerife, España y Dagoberto Rodríguez, Curador del Jardín Botánico La Laguna, El Salvador.

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