Abstract
In the previous papers, authors reported the existance of many ferulates in rice bran oil.
In the course of detailed gas chromatographic investigation of unsaponifiable matters from these ferulates, existance of matters with RRT of 2.74 (X), 3.08 (Y) and 3.64 (Z) was found in the outer field of cyclobranol with RRT of 2.54 (RRT of cholesterol : 1.00, as reference).
These 3 fractions were isolated from the residue of extraction of cyclobranol by means of column chromatography, digitonin treatment and repeated recrystallisation.
Every fraction was confirmed as a saturated new triterpenoid, according to inspection of IR spectrum, TLC, Liebermann-Burchard reaction and X-ray diffraction pattern. Physical data were as follows : X : C30H52O2, mp 181.5°C, [α] D+48.7, Y : C32H56O2, mp 109.0°C, [α] D+47.7 and Z : C32H56O2, mp 151.0°C, [α] D+42.7.
The newly isolated triterpenoids were presumed as 25-hydroxy cycloartanol, 25-ethoxy cycloartanol and 24-methyl-24-methoxy cycloartanol.
