Autor: I. I. Kapustina, O. P. Moiseenko, Valentin A. Stonik, Ljudmila P. Ponomarenko
Rok vydání: 2001
Předmět:
Zdroj: Chemistry of Natural Compounds. 37:515-519
ISSN: 0009-3130
DOI: 10.1023/a:1014856530108
Popis: NMR spectroscopy, capillary GLC, and GLC-MS are used to study the composition of free and sulfated sterols from the far-east starfishLeptasterias alaskensis asiatica(Fischer) andL. Fisheri(Djakonov). The total free sterols of both species are shown to have similar qualitative and quantitative compositions and contain mainlyΔ7-sterols. Sterol sulfate fractions contain cholesterol sulfate as the main component but differ in the ratios ofΔ5:δ0:δ7-sterol derivatives. Possible reasons for these differences are discussed. A new steroid, 3β-hydroxycholest-5-en-7-one sulfate, was isolated.
Databáze: OpenAIRE