Pregn-4-ene-3,20-dione,6b-hydroxy- (8CI); Progesterone, 6b-hydroxy- (6CI); 4-Pregnen-6b-ol-3,20-dione; 6b-Hydroxypregn-4-en-3,20-dione; 6b-Hydroxypregn-4-ene-3,20-dione; 6b-Hydroxyprogesterone; U 27605
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