| 摘要 |
<p>18-Methyl-19-nor-20-keto steroids of the formula <IMAGE> wherein R1 and R2 collectively are an oxygen atom, or each is hydrogen, or one of R1 and R2 is hydrogen and the other is hydroxy, and R3 is a ketonic oxygen atom or two hydrogen atoms, possess CNS-depressant activity, especially anesthetic-narcotic activity.</p> |
