OESTRIOL-3-GLUCOSIDURONATE, A MAJOR URINARY METABOLITE OF OESTRIOL AND OESTRIOL-16(17?)-GLUCOSIDURONATE
ABSTRACT Oestriol-16-14C (OE3-16-14C) was administered to a non-pregnant woman and oestriol-16-14C-16(17?)-glucosiduronate (OE3-16-14C-16(17?)Gl) to a pregnant woman and the urinary oestriol conjugates were isolated and identified. More than 85 per cent of the radioactive material administered to the two subjects was excreted in the urine within 96 hours. In both cases more than 16 per cent of the administered radioactive material was isolated and identified as oestriol-16-14C-3-glucosiduronate (OE3-16-14C-3Gl) and more than-70 per cent as OE3-16-14C-16(17?)Gl. It is concluded that oestriol-3-glucosiduronate is a major urinary metabolite of both oestriol and oestriol-16(17?)-glucosiduronate.