(7alpha,14beta,15beta,16beta,17alpha)-3-Methoxy-7-methyl-15,16-methyleneestra-2,5(10)-diene-17-methanol 、 (14β,17α)-17-(hydroxymethyl)estr-4-en-3-one 、 以
1,4-二氧六环 为溶剂,
以the product obtained in the previous step (0.38 g)的产率得到(7alpha,14beta,15beta,16beta,17alpha)-17-(Hydroxymethyl)-7-methyl-15,16-methyleneestr-4-en-3-one