beta-carotene and esculetin

To study the chemical constituents of flower buds of Lonicera similes.. The chemical constituents were isolated and purified with macroporous resin, silica gel column chromatography, gel chromatography, ect. The structures were elucidated according to the references combined with the application of spectrum techniques such as 1H-NMR, 13C-NMR ect.. Nine compounds were isolated and their structures were identified as 5-hydroxyl-7,4'-dimethoxyflavone (I), rutin (II), quercetin (III), amentoflavone (IV), aesculetin (V), beta-sitosterol (VI), 5-hydroxyl-7,3', 4'-trimethoxyflavone (VIII), oleanolic acid (VIII), beta-daucosterin (IX).. Among the nine isolated compounds, compounds I, II, III, IV, V, are flavonoids. Compounds I , IV, V, VII, VIII, IX are isolated from this plant for the first time.

Topics: beta Carotene; Biflavonoids; Flavones; Flowers; Lonicera; Molecular Structure; Umbelliferones

A phytochemical analysis of cassava (Manihot esculenta Crantz) fresh roots and roots suffering from post-harvest physiological deterioration (PPD) has been carried out. The first isolation and identification of galactosyl diacylglycerides from fresh cassava roots is reported, as well as beta-carotene, linamarin, and beta-sitosterol glucopyranoside. The hydroxycoumarin scopoletin and its glucoside scopolin were identified from cassava roots during PPD, as well as trace quantities of esculetin and its glucoside esculin. There is no isoscopoletin in cassava roots during PPD.

Topics: beta Carotene; Biological Factors; Coumarins; Esculin; Food Handling; Galactolipids; Glucosides; Manihot; Metabolome; Molecular Structure; Nitriles; Plant Roots; Scopoletin; Sitosterols; Umbelliferones