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This article, published in the Chemistry of Natural Compounds journal, discusses the discovery of a new species of Michelia plant, M. compressa var. lanyuensis, found only in Lanyu, Taiwan. The focus of the article is on the chemical analysis of the plant and the isolation of sixteen compounds from its flowers. The antioxidative activity of these compounds was tested, and three of them, o-hydroxybenzoic acid, N-trans-caffeoyltyramine, and N-cis-caffeoyltyramine, showed strong antioxidative properties. The article provides detailed information on the collection, identification, extraction, and isolation processes used, as well as the chemical and physical properties of the compounds. The experiments conducted to evaluate the antioxidant abilities of the compounds included testing their ability to scavenge free radicals, chelate metal ions, and exhibit reducing power. The results indicated that the three mentioned compounds exhibited significant antioxidative activity. The investigation was supported by a grant from Yuan's General Hospital. [Extracted from the article]

The article "Secondary Metabolites of Ficus formosana" published in Chemistry of Natural Compounds discusses the phytochemical composition of Ficus formosana, a plant traditionally used in food and folk medicine. The study identifies various compounds present in the plant, such as phenylpropanoids and flavonoids, and highlights their potential health benefits, including antitumor activities. The research provides valuable information for potential drug design and was supported by a grant from Yuan's General Hospital. [Extracted from the article]

This article, published in the Chemistry of Natural Compounds journal, discusses the secondary metabolites of Zingiber oligophyllum, a plant commonly known as ginger. The rhizomes of this plant have been used in traditional medicine in East Asian, Indian, and Arabic herbal traditions for various ailments. The study isolated several compounds from the rhizomes of Z. oligophyllum for the first time, including phenylalkanoids, diarylheptanoids, and benzenoids. These compounds have potential anti-inflammatory, antioxidative, antithrombosis, and cancer chemopreventive activities, and may also help reduce arthritis symptoms. The research was supported by a grant from Yuan's General Hospital. [Extracted from the article]

Part of fraction 1 (17.6 g) was subjected to silica gel chromatography by eluting with I n i -hexane-acetone (50:1) and enriched with acetone to furnish four further fractions (1-1-1-3). Part of fraction 1-3 (5.1 g) was subjected to silica gel chromatography by eluting with I n i -hexane-acetone (50:1) and enriched gradually with acetone to furnish five fractions (1-3-1-1-3-5). Fraction 1-3-5 (1.8 g) was further purified on a silica gel column using I n i -hexane-acetone mixtures to yield a mixture of I i -sitosterol and stigmasterol (34.2 mg). Part of fraction 2 (17.2 g) was subjected to silica gel chromatography by eluting with I n i -hexane-acetone (50:1) and enriched with acetone to furnish three further fractions (2-1-2-3). [Extracted from the article]