methyl (1R,4aS,10aR)-6-formyl-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene-1-carboxylate 、
2,4-二硝基苯肼 以75%的产率得到methyl (1R,4aS,10aR)-6-{[2-(2,4-dinitrophenyl)-hydrazinylidene]methyl}-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene-1-carboxylate