The Role of Steroids in the Control of Mammalian Ovulation 43 



SQ-IO 



OAc 



CjH, 



SQ-iO.,2 



SQ-Q5,0.I 



0-0.5,0.3,02 9^^^ 



— - ',..C=CH 



AcO 



C=CH 



XLOT 

 SQ— 5 , 2, 0.4,0.08 



XLvni 



5Q-I0 



Fig. 9. 17a-Methyl, ethyl and ethinyl derivatives of 19-nortestosterone. (Dosage in milli- 

 grams. SQ = subcutaneous injection; O = by gavage.) 



OH 



,/C— CH2OH 

 OH 



Q^f^-^i^-^.^ XLIX 

 SQ-IO.2,0.4 



CH2CH2OH 



CH2CH2^Cn2 



^-CH2CH2 CH CHj 



LH 

 SQ-2. 0.2. 0.04 , 0.008 



50-05,01,002 

 ,0-5,1,0.5 



C^CCgHg 



SQ-20,O4,0.08 

 0-1.0,2 



Fig. 10. Higher 17a-derivatives of 19-nortestosterone. (Dosage in milligrams. SQ = sub- 

 cutaneous injections; = by gavage.) 



