胆酸 、
烟碱 以
甲醇 为溶剂,
反应 12.0h,
以70%的产率得到3-[(2S)-1-methylpyrrolidin-1-ium-2-yl]pyridine;(4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate