Chemistry Letters p. 1647 - 1650 (1981)
Update date:2022-08-06
Topics:
Higa, Tatsuo
Tanaka, Jun-ichi
Tsukitani, Yasumasa
Kikuchi, Hiroyuki
Four new polyoxygenated steroids (4-7) containing a spiroketal function have been isolated from the gorgonian Isis hippuris.Their structures were determined by spectral correlation and by interconversion.Previously assigned configuration at the C-22 of hippurin-1 (3) was reversed by spectroscopic evidence.Two (4,7) of the steroids exhibited potent in vitro anticancer activities.
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