| abstract |
A method of controlling male fertility in warm-blooded male animals comprising administering to male warm-blooded animals an amount of a compound selected from the group consisting of a compound of the formula <IMAGE> I wherein R1 and R2 are individually selected from the group consisting of alkyl of 1 to 8 carbon atoms and benzyl, R3 is a alpha - or beta -methyl, n is an integer from 2 to 10, R4 is hydrogen, R5 is hydrogen, R6 and R7 are hydrogen, and their non-toxic, pharmaceutically acceptable acid addition salts in an amount sufficient to control male fertility. |