the molecular ion peaks of steroids were obtained at m/z460 ( 17 alpha-hydroxyprogesterone ; 17ohp ) , m/z548 ( corticosterone ; b ) , m/z470 ( 11-deoxycortisol ; s ) , m/z417 ( pregnenolone ; pl ) , m/z372 ( progesterone ; pt ) , m/z558 ( cortisol ; f ) , m/z389 ( dehydroepiandrosterone ; dhea ) , m/z371 ( estrone ; e1 ) , m/z416 ( estradiol ; e2 ) , m/z504 ( estriol ; e3 ) , m/z389 ( testosterone ; t ) , m/z344 ( androstenedione ; a ) and m/z372 ( is ) .
C0045010
17 alpha-hydroxyprogesterone
C0020387
17ohp