| 释义 |
tachysterol Biochem.|tækɪˈstɪərɒl, -ˈstɛrɒl|
[ad. G. tachysterin (A. Windaus et al. 1932, in Ann. d. Chem. CCCCXCIX. 188): see tachy- and sterol.]
An oily isomer of ergosterol and lumisterol, C28H43OH, which will form calciferol when irradiated with ultraviolet light.
1933Chem. Abstr. XXVII. 729 The addn. compd. from irradiated ergosterol and citraconic anhydride (20 g.) and 75 cc. Ac2O, warmed 2 hrs., give [sic] 7 g. of tachysteryl acetate citraconic anhydride... Tachysterol..has not been crystd. 1954A. White et al. Princ. Biochem. l. 1053 Of the series of compounds obtained from the irradiation of ergosterol only calciferol (vitamin D2) possesses antirachitic activity. However, one of the series, tachysterol, may be catalytically reduced to dihydrotachysterol.., which is antirachitic. 1976H. Campion et al. in B. E. C. Nordin Calcium, Phosphate & Mineral Metabolism xii. 445 Lythgoe has reported the synthesis of a closely related isomer, tachysterol, by a nonphotochemical pathway. |