Composition of organic compounds in bottom sediments of lakes in the taiga and steppe zones in Siberia

Steroids from a Far-Eastern Glass Sponge Aulosaccus sp.

“…27,[29][30][31][32][33][34][35] Furthermore, compound 4e and/or its several homologs were detected in marine and lacustrine sediments. 15,16,36 Fraction III (Table 1), containing major sterols of Aulosaccus sp., was obtained using repeated column chromatography on silica gel. This fraction, analogous to fraction I, was rich in saturated components, especially in C 27 compound.…”

“…12 However, 3-keto derivatives of stanols have been found not only in glass sponges, but also in demosponges 6,13 and in marine and lacustrine sediments. [14][15][16] In fraction I, 3-keto derivatives of Δ 7 -and Δ 8(14) -sterols were present in trace amounts. In the mass spectra of these compounds, typical fragmentation patterns were observed according to reference spectra and GC-MS data described in Iida et al 8 and Smith and Brooks.…”

“…12 However, 3-keto derivatives of stanols have been found not only in glass sponges, but also in demosponges 6,13 and in marine and lacustrine sediments. 14 –16…”

“…27,29,30,31,32,33,34,35 Furthermore, compound 4e and/or its several homologs were detected in marine and lacustrine sediments. 15,16,36…”