in the latter procedure the ions at m/e 605 and 607 ( specific for the derivatives of unlabeled and labeled 18-hydroxycorticosterone , respectively ) , at m/e 591 and 593 ( specific for the derivatives of unlabeled labeled aldosterone , respectively ) and at m/e 548 and 550 ( specific for the derivatives of unlabeled and labeled corticosterone , respectively ) were followed through the gas-liquid chromatography .
C0000172
18-hydroxycorticosterone
C0010124
corticosterone