| 单词 | suprasterol i |
| 释义 | > as lemmassuprasterol I Either of two isomeric polycyclic compounds ( suprasterol I, suprasterol II), produced by prolonged ultraviolet irradiation of calciferol (vitamin D2).Formula: C28H44O. ΘΚΠ the world > matter > chemistry > organic chemistry > alcohols > [noun] > steroid alcohols > sterols > named cinchol1885 cholesterol1894 phytosterol1898 sitosterol1898 stigmasterol1907 lanosterol1929 suprasterol1930 lumisterol1932 tachysterol1933 1930 Brit. Chem. Abstr. A. 1577/2 Suprasterol I alters gradually when exposed to air and is unaltered by further irradiation... Suprasterol II gives a crystalline dihydro-derivative when reduced catalytically. 1943 Endeavour Apr. 73/2 Calciferol itself [vitamin D] was also liable to be broken down further to inactive substances—toxisterol and suprasterols I and II. 1976 H. Campion et al. in B. E. C. Nordin Calcium, Phosphate & Magnesium Metabolism xii. 449 D. Windaus et al. (1932) postulated the first scheme of ergosterol irradiation: Ergosterol → lumisterol → tachysterol → (ergo)calciferol, its further irradiation leading to suprasterol. 2001 M. F. Holick in P. U. Giacomoni Sun Protection in Man ii. 20 The exact biologic functions of lumisterol, tachysterol, suprasterols, and toxisterols is not well understood. < as lemmas |
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