The separation of non-ketonic and ketonic sodium glucuronidates from the ‘sodium pregnanediol glucuronidate’ of human pregnancy urine: the isolation of pure sodium pregnane-3(α), 20(α)-diol glucuronidate

It has recently been shown (Marrian & Gough, 1946 a, b) that the 'sodium pregnanediol glucuronidate' ('NaPG') prepared from human pregnancy urine by the method of Venning & Browne (1936) contains about 20 % of a water-soluble derivative of pregnan-3(o)-ol-20-one which cannot be removed