in another experiment incubation of cholesterol-1,2-3h yielded 5 % pregnenolone , 0.5 % 17alpha-hydroxypregnenolone , 0.2 % ( 20r,22r ) -20,22-dihydroxy-cholesterol , but no significant ( less than 0.01 % ) 17alpha-hydroxy-cholesterol , ( 20s ) -17alpha , 20-dihydroxycholesterol or ( 20s,22r ) -17alpha , 20,22-trihydroxycholesterol .
C0373704
pregnenolone
C0376260
17alpha-hydroxypregnenolone