Rauter, A. P.Filipe, M.M.Prata, C.Noronha, J.P.Sampayo, M.A.M.Justino, JorgeBermejo, J.2023-09-152023-09-152005-07Rauter, A.P.; Filipe, M.M.; Prata, C.; Noronha, J.P.; Sampayo, M.A.M.; Justino, J. & Bermejo, J. (2005). A new dihydroxysterol from the marine phytoplankton Diacronema sp.. Fitoterapia, 76(5), 433-438. Doi:10.1016/j.fitote.2005.03.0030367-326Xhttp://hdl.handle.net/10400.15/4546Diacronema 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.engsterolsdihydroxysterolDiacronema sp.microalgaejournal article10.1016/j.fitote.2005.03.003