Add time:07/24/2019         Source:sciencedirect.com

(16α-3H); (4-14C)-Pregnenolone (3H: 14C ratio 3·15) was administered to two Digitalis purpurea plants and the biosynthesized digitoxigenin (3H: 14C ratio 3·17) and gitoxigenin (3H: 14C ratio 3·1) were isolated. The results indicate a direct replacement of the 16β-hydrogen of pregnenolone by a hydroxyl group in the biosynthesis of gitoxigenin.

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