A new dihydroxysterol from the marine phytoplankton Diacronema sp.
2005
Rauter, A. P. | Filipe, M.M. | Prata, C. | Noronha, J.P. | Sampayo, M.A.M. | Justino, Jorge | Bermejo, J.
Diacronema sp. was cultured and its sterols were separated by column chromatography on silica gel. The new sterol 24-ethyl-4α-methyl-cholestane-3,20-diol (1) was characterised by NMR and MS spectrometry, as well as (22E)-24-ethyl-4α-methyl-5α-cholest-22-en-3β-ol (2) and β-sitosterol, the major components of the sterol fractions. Neither the biosynthetic origin of the new dihydroxysterol nor its role in the biochemistry of Diacronema is known.
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