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Neem oil, also known as margosa oil, is a vegetable oil pressed from the fruits and seeds of the neem (Azadirachta indica), a tree which is indigenous to the Indian subcontinent and has been introduced to many other areas in the tropics.
Azadirachtin is formed via an elaborate biosynthetic pathway, but is believed that the steroid tirucallol is the precursor to the neem triterpenoid secondary metabolites. Tirucallol is formed from two units of farnesyl diphosphate (FPP) to form a C 30 triterpene, but then loses three methyl groups to become a C 27 steroid.
Azadirachta is a genus of two species of trees in the mahogany family Meliaceae. [2] Numerous species have been proposed for the genus but only two are currently recognized, Azadirachta excelsa and the economically important tree Azadirachta indica, the neem tree, from which neem oil is extracted.
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If you find any pests on the plant, you can apply an insecticide according to the instructions on the package or wipe the leaves gently with neem oil. Bio Insecticide $24.99 at amazon.com
Representation of nimbin analog N2. Nimbin is a triterpenoid isolated from the neem tree (Azadirachta indica).Nimbin is thought to be responsible for much of the biological activities of neem oil, and is reported to have anti-inflammatory, antipyretic, fungicidal, antihistamine and antiseptic properties. [2]