gamma-sitosterol and 1-hexacosanol

To study the chemical constituents of Wedelia prostrata.. Chromatography and spectroscopic analysis were employed to isolate and elucidate the chemical constituents in the plant.. Seven compounds were obtained and identified as ent-kaur-16-en-19-oic acid (I), ent-kaur-16alpha, 17-dihydroxy-19-oic acid (II), ent-kaur-15alpha-senecioyloxy-16-en-19-oic acid (III), beta-sitosterol (IV), stigmasterol (V), stigmasterol-3-O-beta-D-glucopyranoside (VI) and n-hexacosanol (VII).. Compounds I-III are isolated from this plant for the first time.

Topics: Diterpenes; Fatty Alcohols; Glucosides; Molecular Structure; Plant Components, Aerial; Sitosterols; Spectrophotometry, Ultraviolet; Stigmasterol; Wedelia

The analysis of the total lipid fraction from the Sayali variety of olive oil was accomplished in the present investigation. Glyceridic, unsaponifiable and flavour fractions of the oil were isolated and identified using several analytical methods. Chromatographic techniques have proven to be suitable for these determinations, especially capillary gas chromatography. Gas chromatography coupled to mass spectrometry was successfully used to identify sterols, triterpenes alcohols, 4-monomethylsterols, aliphatic alcohols and aroma compounds in our samples. Furthermore, solid phase microextraction was used to isolate volatiles from the total lipid fraction. Results from the quantitative characterization of Sayali olive oil showed that oleic acid (77.4%) and triolein (47.4%) were the dominant glyceridic components. However, the main compounds of the unsaponifiable fraction were beta-sitosterol (147.5mg/100g oil), 24-methylene cycloartenol (146.4mg/100g oil) and hexacosanol (49.3mg/100g oil). Moreover, results showed that the aldehydic compounds were the major flavours present in Sayali olive oil.

Topics: Alcohols; Chromatography, High Pressure Liquid; Chromatography, Thin Layer; Fatty Acids; Fatty Alcohols; Flame Ionization; Gas Chromatography-Mass Spectrometry; Lipids; Oleic Acid; Olive Oil; Phytosterols; Plant Oils; Sitosterols; Sterols; Triglycerides; Triolein; Tunisia

To study the chemical constituents of Primula sikkmensis Hook.. The chemical constituents of the plant were isolated and purified by column chromatography and their structures were elucidated by spectroscopic analysis.. Seven compounds were isolated and identified as kaempferol, quercetin, Prunetin, hexacosanol, Apigenin, beta-sitosterol, quercetin-3-O-beta-D-glucoside, respectively.. Compounds I--VII are obtained for the first time from this plant.

Topics: Apigenin; Fatty Alcohols; Flavones; Flowers; Isoflavones; Kaempferols; Plants, Medicinal; Primula; Quercetin; Sitosterols; Spectrophotometry, Ultraviolet