21β-hydroxy-3,4-seco-lupa-4(23),20(29)-dien-3-oic acid 在
Jones reagent 作用下,
以
丙酮 为溶剂,
以5.5 mg的产率得到3-[(3S,4S,5R,8R,9R,10R,13S,14S,15R)-4,9,10,13-tetramethyl-16-oxo-3,15-bis(prop-1-en-2-yl)-1,2,3,5,6,7,8,11,12,14,15,17-dodecahydrocyclopenta[a]phenanthren-4-yl]propanoic acid