cytellin and esculetin

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

To investigate the chemical constituents from the leaves of Vaccinium bracteatum.. Many column chromatographic techniques were used for the isolation and separation of chemical constituents. Their structures were elucidated on the basis of spectral analysis and chemical evidences.. Twelve compounds were isolated from the plant, and they were identified as chrysoeriol (1), scopoletin (2), trans-p-hydroxycinnamic acid (3), trans-p-hydroxycinnamic acid ethyl ester (4), cafeic acid ethyl ester (5), beta-sitosterol (6), iuteolin (7), quercetin (8), esculetin (9), cafeic acid (10), isolariciresinol-9-O-beta-D-xyloside (11), 10-O-trans-p-coumaroylsandoside (12).. Compounds 4, 5, 11, 12 were isolated from the genus Vaccinium for the first time, and compounds 1, 2, 9, 10 were isolated from this plant for the first time.

Topics: Coumaric Acids; Flavones; Flavonoids; Furans; Glycosides; Lignin; Molecular Structure; Plant Leaves; Scopoletin; Sitosterols; Umbelliferones; Vaccinium