(20Ξ)-2'-(4-acetylamino-phenyl)-17,20;20,21-bis-methanediyldioxy-16α-methyl-2'
H-pregn-4-eno[3,2-
c]pyrazol-11-one 在
sodium tetrahydroborate 作用下,
以
异丙醇 为溶剂,
生成
(20Ξ)-2'-(4-acetylamino-phenyl)-17,20;20,21-bis-methanediyldioxy-16α-methyl-2'H-pregn-4-eno[3,2-c]pyrazol-11β-ol