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20-ISONITRILES 17 (20) UNSATURATED STEROID DERIVATIVES, PROCESS FOR PREPARING THEM AND USE THEREOF IN THE PREPARATION OF 17ALPHA-HYDROXY 20-KETO STEROIDS.
20-ISONITRILES 17 (20) UNSATURATED STEROID DERIVATIVES, PROCESS FOR PREPARING THEM AND USE THEREOF IN THE PREPARATION OF 17ALPHA-HYDROXY 20-KETO STEROIDS.
