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机译:Delta;4ndash;3hyphen;KETOPREGNENEhyphen;20alpha;alpha;OL AND Delta;4ndash;3hyphen;KETOPREGNENEalpha;20beta;alpha;OLcomma; TWO NATURALLY OCCURRING METABOLITES OF PROGESTERONEperiod; ISOLATIONcomma; IDENTIFICATIONcomma; BIOLOGIC ACTIVITY AND CONCENTRATION IN HUMAN TISSUES