17-Ketosteroid Excretion in Ageing Subjects 129 



Androst-4-gne-3,17-dione 





0^' 



(lldesoxy-corfisolj 



y 



Anc[rost-1cn-![/3-o(5j7dinr]e 



CWzOH 



Prggn-4-m-ll5J7c(,Z!-tnol-5,20-d(one 

 (Corttsolj 



•^ 



HO ^ H 



Andro5ten-3c(-ol-l7-one 

 (Androsterone) 



.0 



/ttiocho[an-5o<oll7-one 



WO ^rt 



Andrastan-5c(-oMIJ7-dLon2 



No-Mr^ 



Aridro5tar)e-3<ll^-diol-17-one 



MO ^i\ 

 i^tiocho[an-5^-ol-Il,l7dione 



HO. 



HO- ^n 

 /5^tiocholane-5<I l/5d(ol- l7one 



Fig. 2. Relationships between adrenal steroids and urinary 

 a-1 7-ketosteroids. 



10 



