Steroid compounds of marine sponges. XI. Steroids of the Australian spongeTrachyopsis sp.

The compositions of two steroid fractions from the Australian spongeTrachvopsis sp. have been investigated. The fractions of steroid sulfates consisted of the trisulfates of halistanol (76%) and of 24-isopropyl-5-cholest-22-ene-2,3,6-triol (20%). In the sterol fraction, axinyssasterol (64%) and 24-isopropyl-5-cholest-22Z-en-3-ol (30%) were identified.Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Branch, USSR Academy of Sciences, Vladivostok. Translated from Khimiya Prirodnykh Soedineni, No. 2, pp. 215–218, March–April, 1990.