Abstract
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.
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