发明授权
US3148183A Delta4 and delta4, 6-17alpha-acyloxy-20-oxo-steroid-[3, 2-c] pyrazoles of the pregnane series 失效
孕酮系列的Delta4和δ4,6-17α-酰氧基-20-氧代 - 类固醇 - [3,2-c]吡唑

Delta4 and delta4, 6-17alpha-acyloxy-20-oxo-steroid-[3, 2-c] pyrazoles of the pregnane series
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