analysis of the creatinine , 17-oxosteroids , 17-oxogenicsteroids , estrogens , pregnanediol , androsterone + etiocholanolone and estriol in urine samples acidified to ph 2-3 with hcl , and in the same samples acidified with buffer , gave results which were indistinguishable from each other .
C0000167
17-oxosteroids
C0002865
androsterone