stigmasterol and protocatechuic-acid

Hyperpigmentation is considered by many to be a beauty problem and is responsible for photoaging. To treat this skin condition, medicinal cosmetics containing tyrosinase inhibitors are used, resulting in skin whitening. In this study, taraxerol methyl ether (

Topics: Antioxidants; Arbutin; Cell Line, Tumor; Cell Proliferation; Flavonoids; Humans; Hydroxybenzoates; Manilkara; Monophenol Monooxygenase; Neoplasms; Oleanolic Acid; Phytochemicals; Pyrones; Stigmasterol

This work reports isolation of an unusual lignan with a bicyclic [2.2.2] octene skeleton, named rufescenolide (1), from stems of Cordia rufescens, along with β-sitosterol, stigmasterol, syringaldehyde, 3-β-O-D-glucopyranosyl-sitosterol, methyl caffeate, 4-methoxy-protocatechuic acid and methyl rosmarinate. Structural characterizations employed IR spectroscopic, ESIHRMS and mono and dimensional NMR spectroscopy.

Topics: Bridged Bicyclo Compounds; Caffeic Acids; Cordia; Hydroxybenzoates; Lignans; Magnetic Resonance Spectroscopy; Molecular Structure; Octanes; Plant Stems; Sitosterols; Stigmasterol

To study the chemical constituents in ethyl acetate extraction of Semen Litchi.. The compounds were isolated and purified by column chromatography on silica gel and Sephadex LH-20 coupled with preparative silica gel TLC, their structures were identified by physicochemical properties and spectrum analysis.. Five compounds were isolated and identified as stigmasterol (1), P-hydroxy-benzaldehyde (2), protocatechuic acid (3), daucosterol (4) and kaempferol-3-O-beta-D-glucopyranoside (5).. Compounds 2 and 5 are obtained from this plant for the first time.

Topics: Benzaldehydes; Fruit; Hydroxybenzoates; Kaempferols; Litchi; Molecular Structure; Seeds; Sitosterols; Stigmasterol

Seven compounds were isolated from Neonauclea sessilifolia. They are paeonol, 3,4-dihydroxybenzoic acid, scopoletin, anthraquinnones chrysophanol, 4H-1-benzopyran-4-one,5,7-dihydroxy-2-methyl, beta-sitosterol and stigmasterol glucoside. These compounds were isolated at first time from this genus and this plant.

Topics: Acetophenones; Gas Chromatography-Mass Spectrometry; Glucosides; Hydroxybenzoates; Plant Stems; Plants, Medicinal; Rubiaceae; Scopoletin; Sitosterols; Stigmasterol