- 14α-Methyl-5α-cholest-9(11)-en-3β-ol () and 4α,14α-dimethyl-5α-cholest-9(11)-en-3β-ol () have been isolated from the sea cucumber and characterised by 1H NMR, 13C NMR and mass spectrometry. Lanost-9(11)-en-3β-ol () has also been tentatively identified. The relevance of this series of Δ9(11)-sterols to holothurin biosynthesis is briefly discussed.
-已从海中分离出14α-甲基-5α-胆甾9(11)-en-3β-ol()和4α,14α-二甲基-5α-胆甾9(11)-en-3β-ol()黄瓜,并通过1 H NMR,13 C NMR和质谱进行表征。还初步确定了Lanost-9(11)-en-3β-ol()。简要讨论了该系列的Δ9 (11)-固醇与全盐素生物合成的相关性。
As authentic samples for identification of 29-norlanostane derivatives isolated from plant fossil, 29-norlanostan-24-one and -23-one, 29-norlanost-9(11)-en-24-one, -23-one, and -3-one, 29-norlanost-7-en-3-one, and 29-norlanostan-3-one were synthesized from a commercial lanosterol containing dihydrolanosterol.