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Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (3): 341.

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Studies on the Chemical Structure of Nephalsterol-B

ZENG Long-mei1, WANG Guiyang-shen1, MA Li-bin2, TU Guang-zhong2   

  1. 1. Department of Chemistry, Zhongshan University, Guangzhou, 510275;
    2. Beijing Institute of Microchemistry
  • Received:1991-07-06 Online:1992-03-24 Published:1992-03-24

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Abstract: In the previous paper, a 19-hydroxylated sterol, nephalsterol-A.(1) was reported.This paper reports another 19-hydroxylated sterol, Nephalsterol-B(2) which was isolated from the same soft coral Nephthea tiexiexae verseveldt.2 is colorless needle crystals, m.p.159～161℃(EtOAc); m.p.160～162℃ (acetone), [a]D27+25°(C0.100, CH3OH).The structure of 2 is colorless crystals, m.p.159-161℃EtOAc) ; m.p.160～162℃.(acetone), [a]D27+25 was deduced as 24-methylene-cholest-5-ene-3p,7℃,19-triol mainly by 1H NMR, 13C NMR 1H-1H and 1H-13C COSY, ROESYspectra.

Key words: Soft corals, Sterols, 24-methylene-cholest-5-ene-3β,7β,19-triol

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