C.I.酸性橙108 、
(17E)-3β-acetoxyandrost-5-en-17-one (O-carboxymethyl)oxime 在
氯甲酸乙酯 、
N,N-二异丙基乙胺 作用下,
以90%的产率得到Acetic acid (3S,8R,9S,10R,13S,14S)-17-[(E)-(2-hydroxy-ethylcarbamoyl)-methoxyimino]-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester