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The unsaponifiable fractions from the Japanese holothurian Stichopus japonicus, and from the mediterranean one Holothuria tubulosa have been analysed by usual chromatographical technics and mass spectrometry. These animals contain mixtures of Δ-5 and Δ-7 sterols (C27, C28 and C29); the Δ-7 series predominates in agreement with the findings already published by other authors. The triterpenic alcohols, lanosterol and cycloartenol have been isolated as their epoxide propionates. D-xylosides of C27, C28 and C29 Δ-5 sterols have also been isolated and analysed.

Sur les Fractions Insaponifiables des Holothuries Stichopus japonicus et Holothuria tubulosa