4-苯基-1,2,4-三唑啉-3,5-二酮 、
Δ5-stigmasterol 以
乙酸乙酯 为溶剂,
以81%的产率得到(2S,4aR,4bR,6aR,7R,9aR,9bS,14aS)-7-((2R,5R)-5-ethyl-6-methylheptan-2-yl)-2-hydroxy-4a,6a-dimethyl-12-phenyl-2,3,4,4a,4b,5,6,6a,7,8,9,9a-dodecahydro-1H,11H-9b,14a-ethenobenzo[c]cyclopenta[h][1,2,4]triazolo[1,2-a]cinnoline-11,13(12H)-dione