(S)-4-((1S,4aS,5R,6S,8aR)-5-Hydroxy-6-isopropyl-8a-methyl-3-oxo-decahydro-naphthalen-1-yl)-2-methyl-butyraldehyde 在
potassium tert-butylate 作用下,
生成 (1R,2S,4aR,4bR,7S,10aS)-1-Hydroxy-2-isopropyl-4a,7-dimethyl-2,3,4,4a,4b,5,6,7,10,10a-decahydro-1H-phenanthren-9-one